Malicious PDF — malware analysis report

Static analysis result for SHA-256 42f72b637a596fc2…

MALICIOUS

PDF

36.5 KB Authoring application: ImageMagick
MD5: 1cddc28963ff71eaf75bd0e8a1c2f902 SHA-1: 3de5dc0c64ba1c8960ab2615bb619fecd0fef9a9 SHA-256: 42f72b637a596fc267a2a6abe0510ac3c5db7f97b49974c7732e98425eda2eb1
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical PDF_SEO_LINK_FARM rule and ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0. The document contains a large number of embedded URLs, all pointing to PDF files on various domains, suggesting a link farm or redirection strategy. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of external links points to a phishing or SEO-based malicious distribution tactic.

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://geekpursuits.org/uploads/1/3/0/7/130776152/64f92bb48b2e205.pdf
    • http://drashcraft.com/uploads/1/3/0/4/130489044/tewalefujelafus-wulufizin.pdf
    • http://leadreads.com/uploads/1/3/0/7/130740330/2604008.pdf
    • http://rotten.red/uploads/1/3/0/7/130739927/kiginigetit-kinenixaro.pdf
    • http://virginiaveterinaryconsultants.net/uploads/1/3/0/6/130604466/fetodizaditisalided.pdf
    • http://stjohnvianneymorisset.com/uploads/1/3/0/3/130323268/dinudixopukunekipeb.pdf
    • http://quaternityoga.com/uploads/1/3/0/6/130603769/7cad1e16bd4fd2a.pdf
    • http://xno0w.dtmgt.com/uploads/1/3/0/7/130739778/2b430dfa3.pdf
    • http://alyssaclements.com/uploads/1/3/0/5/130590273/liwojawi-pufefezo.pdf
    • http://pythonarena.com/uploads/1/3/0/3/130379169/c594763.pdf
    • http://chicagotoeflschool.com/uploads/1/3/0/7/130740538/bosid-lemikoli-bokojajotumak.pdf
    • http://alexlyn.co/uploads/1/3/0/5/130590322/natunowufilirogezu.pdf
    • http://zaixiandaxingyouxi.br3h.com/uploads/1/3/0/7/130775876/130775876.html#bacterias+coliformes+fecais+e+totais

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000334e.bin
63d84c8600656f5de6364205c1801e282e4d35430440cbaf15590e929f0a7b0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x334E 10808 bytes

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