Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e4a5b7984fc9c37…

MALICIOUS

PDF

43.5 KB Authoring application: pstoedit
MD5: 4f89ac8edd9f1009dfcd7e11e203e4a1 SHA-1: 6ab4b888767332b05632616e4b8f67e512d0eebf SHA-256: 7e4a5b7984fc9c372aa78a8e8794e5fb8d53d75355480fa45f55305fe9b4b76d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO manipulation tactic, often used to distribute malicious content or to improve search engine rankings for malicious sites. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic redirection intent. No scripts were extracted from this sample.

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://lastpostwins.com/uploads/1/3/0/5/130539457/f5a90cd142367.pdf
    • http://theacademicadvisinggroup.com/uploads/1/3/0/6/130639413/1946222.pdf
    • http://sumitsakhuja.com/uploads/1/3/0/7/130776111/3bdd86a7ada584.pdf
    • http://beshearsconsulting.com/uploads/1/3/0/2/130289495/zigebazow.pdf
    • http://chivor-emeralds.org/uploads/1/3/0/6/130640144/bubejuxidofa.pdf
    • http://westportbiblechurch.org/uploads/1/3/0/9/130969957/xademabaketumobapon.pdf
    • http://www.bodyartanddesign.com/uploads/1/3/0/2/130291593/fepagolipe.pdf
    • http://juramont.com/uploads/1/3/0/7/130776678/2549075.pdf
    • http://mustangremediation.com/uploads/1/3/0/8/130813357/nulowabezuxajenesis.pdf
    • http://christinaannwilliams.co.uk/uploads/1/3/0/5/130589219/4360390.pdf
    • http://hostmaster.tobymuse.com/uploads/1/3/0/3/130324030/wakejoj-ramiv-risugogarivena-zawesobivig.pdf
    • http://zhcw.brdge.org/uploads/1/3/0/7/130776257/130776257.html#subject+verb+agreement+quiz+hard

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000378a.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x378A 16204 bytes
font_01_sfnt_off00004fcb.bin
281132627f2599bd5537b59932fd5a0976b33450d63b500db64168192cbd8b72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FCB 9280 bytes

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