Malicious PDF — malware analysis report

Static analysis result for SHA-256 9725379d0f02bafa…

MALICIOUS

PDF

33.2 KB Authoring application: pdf-parser
MD5: e50455bf0985d596e147408ac84e1748 SHA-1: ea1a10c574ac634a9d3d981afa77d50f6c6a8818 SHA-256: 9725379d0f02bafad0542923e552553671d990fee6acc4e3f0c89590ea2e1976
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to other PDF files hosted on various domains, indicating a link farm or SEO poisoning tactic. ClamAV detected this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a machine learning classifier also flagged it as malicious with high confidence. The primary attack pattern involves directing users to external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://poeball.net/uploads/1/3/0/2/130272619/fexelo-bawulom-xavuraxaz.pdf
    • http://solutioncities.com/uploads/1/3/0/2/130289638/dasepirataz.pdf
    • http://www.excelbusinessintelligence.com/uploads/1/3/0/6/130639124/9657654.pdf
    • http://adamselementarygear.com/uploads/1/3/0/6/130620337/8373479.pdf
    • http://mymoneybuilder.net/uploads/1/3/0/3/130379589/gapokobediwuzano.pdf
    • http://www.hardingfamilytree.com/uploads/1/3/0/8/130814907/lowugufonedunuji.pdf
    • http://tenlawsofshadow.com/uploads/1/3/0/5/130543941/839efc8720e31.pdf
    • http://ninety-percent.com/uploads/1/3/0/8/130815303/7ecdd666168c.pdf
    • http://readysetflye.com/uploads/1/3/0/6/130621315/4888409.pdf
    • http://casinoonlineaustralia.com/uploads/1/3/0/6/130604537/bavefosefowinag.pdf
    • http://courtbernstudios.co.za/uploads/1/3/0/7/130776257/eb1a4.pdf
    • http://hostmaster.cystitiscure.co.uk/uploads/1/3/0/2/130271179/d94fc6d.pdf
    • http://radiodagen.nl/uploads/1/3/0/7/130776720/1195522.pdf
    • http://alliumbatam-v1.devsite-1.com/uploads/1/3/0/2/130272484/130272484.html#employee+contract+amendment+letter+template

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ac5.bin
538967dda36890f0627c76298b3e70d8db017772db093463ae90933d856f924c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AC5 7148 bytes

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