Malicious PDF — malware analysis report

Static analysis result for SHA-256 af177207d5ffa4ce…

MALICIOUS

PDF

35.2 KB Authoring application: Solid Converter PDF
MD5: 0450ff461bb57f1445a41ff88117da9a SHA-1: 1c316ba738d23f7bae38d7e37e3b0cd8dd5882d4 SHA-256: af177207d5ffa4ce4af0a3b8713111b1f256d95b15e4c6b3c41e5984b43264d4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, a technique commonly used for SEO poisoning and phishing. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to adult content and mobile games, likely serving as a lure to drive traffic to the linked URLs. The primary attack pattern involves redirecting users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://doctorheatherwood.com/uploads/1/3/0/5/130539735/pizivobufotu.pdf
    • http://psupostdoc.org/uploads/1/3/0/5/130590462/gugubatopalijimu.pdf
    • http://nigafa.audiostart11.icu/uploads/2020/01/29/bfc0a07f7bf89.pdf
    • http://andreasclothing.com/uploads/1/3/0/6/130621802/f1c92b77681e47.pdf
    • http://sonnyxyshop.com/uploads/1/3/0/2/130287506/kitiranatezemusuga.pdf
    • http://drmanivongjratts.com/uploads/1/3/0/4/130436094/29500.pdf
    • http://edgelandscapeandmaintenance.com/uploads/1/3/0/2/130289550/130289550.html#mobibooby+sex+mobile+games+download

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010b4.bin
4368ffe1dac689284a7f406565458ae3ddc49e211a3f3c9ae3527ca88d312191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4 7624 bytes

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