Malicious PDF — malware analysis report

Static analysis result for SHA-256 9938d2e0cbc346e3…

MALICIOUS

PDF

36.7 KB Authoring application: PDF Studio
MD5: bf9cff53bbafefc1ba23266dc4a096b3 SHA-1: 9c659e8396b54c15238254785a154d2b7f963ed5 SHA-256: 9938d2e0cbc346e3df55c3cf10e5917b1c68759b2467401a2e919284928e25f0
158 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external links, indicating it is likely part of an SEO spam or phishing campaign. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier further support its malicious nature. The embedded JavaScript is likely used to redirect the user to one of the numerous external PDF URLs, which in turn may host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://solaxabe.lux-scent.ru/uploads/2020/01/28/2f454019cc.pdf
    • https://sulovugen.weebly.com/uploads/1/3/0/3/130379769/6064145.pdf
    • http://youthinkbrand.top/uploads/2020/01/29/bowojina-tetuma-waxim-jaselu.pdf
    • http://newstimes.ru/uploads/2020/01/27/af2f8a579b11189.pdf
    • http://depon.posox.ru/uploads/2020/01/28/jakimikel.pdf
    • http://wumojo.7artllc.com/uploads/2020/01/27/848a0286cc.pdf
    • https://doxolaxewuju.weebly.com/uploads/1/3/0/2/130287872/012712042389.pdf
    • http://dexisibami.jila12.ru/uploads/2020/01/29/tozebogamufi.pdf
    • http://lonu.doma-2.ru/uploads/2020/01/28/fokazozamewibegaba.pdf
    • http://sawirumo.vertoli.ru/uploads/2020/01/27/7279705.pdf
    • http://compressionsuorce.com/uploads/1/3/0/6/130620375/1aa42e19417.pdf
    • https://gorademeja.weebly.com/uploads/1/3/0/3/130312920/e54d155c0.pdf
    • http://bakidep.ekzolocin-ot-gribka.pro/uploads/2020/01/27/votagagizolej_kefabevupepa.pdf
    • http://nickumelectric.com/uploads/1/3/0/3/130313190/130313190.html#back+button+disabled+android

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001345.bin
79562ec0170b8309bd3033f68dbf0412f0b4ffe83976fb78b3b5bb9241e214ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1345 8268 bytes

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