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freepdfreader_installer.exe

Tripro Ltd

The application freepdfreader_installer.exe by Tripro has been detected as adware by 6 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. This version of the installer will bundle the Ask.com Toolbar, a potentially unwanted web browser extension. The file has been seen being downloaded from www.pdfwork.com.
Publisher:
Tripro Ltd  (signed and verified)

MD5:
08acaf20ee11ad2613016ce6acf8a474

SHA-1:
ddc819e0c0737661ca342cee2412b615b8330058

SHA-256:
e14b5d34e8ea171edcbb47c19e608b5018ca22961059f0ac4d64f755f789e49f

Scanner detections:
6 / 68

Status:
Adware

Explanation:
Bundles that Ask.com toolbar as a third-party offer, a web browser extension that may modify a user's search and home pages.

Analysis date:
12/29/2025 3:25:49 PM UTC  (today)

Scan engine
Detection
Engine version

avast!
Win32:Adware-gen [Adw]
2014.9-141030

Dr.Web
Adware.Downware.1417
9.0.1.0303

ESET NOD32
Win32/Bundled.Toolbar.Ask (variant)
8.9701

Malwarebytes
PUP.Optional.Spigot.A
v2014.10.30.03

Reason Heuristics
PUP.Tripro.X
14.10.30.15

XVirus List
Win32.Detected
2.10.30

File size:
3.4 MB (3,600,576 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\downloads\freepdfreader_installer.exe

Digital Signature
Signed by:
Tripro Ltd

Authority:
VeriSign, Inc.

Valid from:
9/29/2013 9:00:00 PM

Valid to:
9/30/2015 8:59:59 PM

Subject:
CN=Tripro Ltd, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Tripro Ltd, L=Hong Kong, S=Hong Kong, C=HK

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
1189C239E85299F4464322E094264D91

File PE Metadata
Compilation timestamp:
2/24/2012 4:19:59 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
98304:lCrZDT0ghfD9OEqXC1gQANfkeoINicPlFtiKbbhI:lCCCbEjrN1THhI

Entry address:
0x39E3

Entry point:
81, EC, D4, 02, 00, 00, 53, 55, 56, 57, 6A, 20, 33, ED, 5E, 89, 6C, 24, 18, C7, 44, 24, 10, D8, 91, 40, 00, 89, 6C, 24, 14, FF, 15, 30, 80, 40, 00, 68, 01, 80, 00, 00, FF, 15, B8, 80, 40, 00, 55, FF, 15, C0, 82, 40, 00, 6A, 08, A3, B8, 2E, 47, 00, E8, 37, 2A, 00, 00, 55, 68, B4, 02, 00, 00, A3, D0, 2D, 47, 00, 8D, 44, 24, 38, 50, 55, 68, 1C, 93, 40, 00, FF, 15, 84, 81, 40, 00, 68, 04, 93, 40, 00, 68, C0, AD, 46, 00, E8, 19, 27, 00, 00, FF, 15, B4, 80, 40, 00, 50, BF, A0, 30, 4C, 00, 57, E8, 07, 27, 00, 00...
 
[+]

Packer / compiler:
Nullsoft install system v2.x

Code size:
28 KB (28,672 bytes)

The file freepdfreader_installer.exe has been seen being distributed by the following URL.

http://www.pdfwork.com/FreePDFReader_Installer.exe

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