Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2c23a2f9e5671d…

MALICIOUS

PDF

39.7 KB Authoring application: Pdftk
MD5: 6620bd7f9064a98e86494f7f618166da SHA-1: cd19dbd641641898a4e763fb53ec0870e7dd8939 SHA-256: 6c2c23a2f9e5671d5cb3b9aea460837fea6a92834eb0337192fa19e74e24399e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, a common technique for SEO poisoning and phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. While no scripts were explicitly extracted, the heuristic firings and the nature of the embedded links suggest a phishing or redirection attack.

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://creditrevival.org/uploads/1/3/0/5/130551341/7768131.pdf
    • http://browndogcannabis.com/uploads/1/3/0/4/130476144/4159415.pdf
    • http://mlhubbard.com/uploads/1/3/0/7/130739433/ranotuxigelexener.pdf
    • http://midmichyouthultimate.com/uploads/1/3/0/4/130436224/1b045253bd7a9.pdf
    • http://practicalss.com/uploads/1/3/0/7/130739502/wigoso-fepuruvune.pdf
    • http://derig.host/uploads/1/3/0/7/130739143/pivekubodevo.pdf
    • http://midlandfencepros.com/uploads/1/3/0/5/130588740/4299530.pdf
    • http://cashyfy.com/uploads/1/3/0/5/130588258/wiwesemid.pdf
    • http://rgue.net/uploads/1/3/0/5/130545753/bc5304e55c90380.pdf
    • http://74-123-79-221.mgwnet.com/uploads/1/3/0/5/130551154/226106.pdf
    • http://8r334.bpmtc.com/uploads/1/3/0/5/130543648/130543648.html#what+causes+inflamed+lymph+nodes+under+arm

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046c0.bin
47c74d0bddb7f6825d9ac55d7f06ab4886511820c798746706de43191bda620a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46C0 7568 bytes

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