Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c895255da0cc7f2…

MALICIOUS

PDF

43.8 KB Authoring application: Serif PagePlus
MD5: 10b06dfeb7c17763c252c15f12cfd0a4 SHA-1: 7eb0562a4252b3a3fe662159b6e86795bb80ad1c SHA-256: 8c895255da0cc7f2d441c91dfad64150690ff17a0ee27e7089cb6da93c0d3f19
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external websites, a technique commonly used for SEO spam or to redirect users to malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. The document body, though heavily obfuscated, also contains URLs that are part of this link farm, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ninthquarterproperties.com/uploads/1/3/0/5/130588394/laxarip.pdf
    • http://oscarchavezphotography.net/uploads/1/3/0/7/130738607/wofufaxune.pdf
    • http://120lakeshoredrive.com/uploads/1/3/0/4/130476503/fd89a452c.pdf
    • http://coriyonemitsu.weebly.com/uploads/1/3/0/4/130483155/romorodisopunafoxaba.pdf
    • http://vegasjunkmovers.com/uploads/1/3/0/5/130543798/nevinipak-siwavuj-mawin.pdf
    • http://misssoutheastpageantry.us/uploads/1/3/0/7/130775297/130775297.html#afasia+motora+transcortical+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000113b.bin
908056dc3f628c0b3046fb4f52ad0d1e6111bdd3459ed3bef23abab9362c7f72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113B 9836 bytes

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