Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd3196102e95370a…

MALICIOUS

PDF

37.5 KB Authoring application: pstoedit
MD5: a99dc6d9517da0c1f894dfe2d4d0b128 SHA-1: 8645715f07341e031c9f2d139a011798ab6ec4ea SHA-256: bd3196102e95370a6aa49d68535cb00d6e3f3a19472f5bc2bc17cf9eb612eebe
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This technique is often used for SEO spam or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly indicate malicious intent. No scripts were extracted from this sample, so the attack pattern is inferred from the URL 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://lune-blanc.com/uploads/1/3/0/8/130874364/6438273.pdf
    • http://yogilea.com/uploads/1/3/0/3/130379181/9155052.pdf
    • http://burningfiddleproductions.org/uploads/1/3/0/5/130588396/258934.pdf
    • http://spencer4orem.com/uploads/1/3/0/8/130873738/8f0a60.pdf
    • http://iloveharvest.com/uploads/1/3/0/8/130814052/2781539.pdf
    • http://www.psychoterapiawdublinie.com/uploads/1/3/0/4/130483285/3263479.pdf
    • http://blesscedbeads.com/uploads/1/3/0/3/130379297/c794225.pdf
    • http://blackwoodforsheriff.com/uploads/1/3/0/5/130588475/zutot.pdf
    • http://garageteepee.com/uploads/1/3/0/6/130639321/5b8bcdbdc435e6.pdf
    • http://iqaluitbeaches.ca/uploads/1/3/0/7/130776182/ruzafa.pdf
    • http://scottdawson.blog/uploads/1/3/0/4/130477252/naxaseluzab_zisumex_sinigone_bogegofukoziwi.pdf
    • http://skicave.com/uploads/1/3/0/2/130273983/0034f.pdf
    • http://southeastjet.com/uploads/1/3/0/8/130813108/8918464.pdf
    • http://alliedhealthcareinstitute.com/uploads/1/3/0/6/130639267/3396764.pdf
    • http://caitlinmoniz.com/uploads/1/3/0/9/130969103/fusire.pdf
    • http://auradayspasalon.com/uploads/1/3/0/2/130291640/motupuparuwuvodasen.pdf
    • http://tarasnaumenko.com/uploads/1/3/0/3/130323161/130323161.html#how+to+edit+pdf+document+in+adobe+acrobat+pro

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000036c4.bin
d4d1917baa27caa6850ad7f487c57bf5480b34cde9c74fdf80e94c68a490fda5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x36C4 8112 bytes

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