Malicious PDF — malware analysis report

Static analysis result for SHA-256 351b61912b30e7e7…

MALICIOUS

PDF

34.6 KB Authoring application: Inkscape
MD5: 116d12ab5702bcc97127166cfda504b9 SHA-1: 8db5278a95b02027fdbda910fdee413079243919 SHA-256: 351b61912b30e7e7bc27bbad1c20f34832794e06b7de4111d114c2fcc0a0b4ff
150 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier with high confidence. The critical heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, with the first URL being http://bayarea-interactivehypnotherapy.org/uploads/1/3/0/7/130738505/1103193.pdf. This suggests the document is designed to redirect users to numerous other malicious PDF files, likely for phishing or malware distribution. No scripts were extracted from this sample.

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://bayarea-interactivehypnotherapy.org/uploads/1/3/0/7/130738505/1103193.pdf
    • http://dearbestie.com/uploads/1/3/0/2/130287281/roniwedoxazuvi-lobegudava.pdf
    • http://nightowlinvestments.com/uploads/1/3/0/6/130603977/kafenazudivazu-nametojosu-womapo-nikutevevufono.pdf
    • http://backroadcreations.com/uploads/1/3/0/5/130550711/xeramigogedi.pdf
    • http://yasminerose.com/uploads/1/3/0/3/130324050/jabijuzagoragujavi.pdf
    • http://dmytro.it/uploads/2020/01/28/37fcab73331e0f2.pdf
    • http://leclfr.com/uploads/1/3/0/7/130738902/wutawelerilodes.pdf
    • http://colddiamnd.com/uploads/1/3/0/3/130313190/130313190.html#caleffi+thermostatic+mixing+valve+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001349.bin
9d4039db97bf3e2922cf1642ac1cc080bf57390bd553f6725ebe37423716b12e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1349 8808 bytes
font_01_sfnt_off00004bb9.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BB9 2652 bytes

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