Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2c5f23bb00743b…

MALICIOUS

PDF

64.0 KB Authoring application: SWFTools
MD5: edca85021967c3f6c488a9579e15d186 SHA-1: 25fec430aab485d27ba6d4f464159e0cffac2b31 SHA-256: 6b2c5f23bb00743b14aa5f25c871e6e2902299937c81e51cc82108c114987fa2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to other PDF files, suggesting a link farm or redirection scheme. This is further supported by the 'PDF_SEO_LINK_FARM' heuristic firing, indicating a mass of external PDF links. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score reinforce the malicious nature of this document.

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://leadingchristianity.com/uploads/1/3/0/5/130547405/pimazu.pdf
    • http://pewo.levina.info/uploads/2020/01/29/243155.pdf
    • http://yellowdaisycourt.com/uploads/1/3/0/6/130620764/2492417.pdf
    • http://janpalson.com/uploads/1/3/0/5/130539113/31eaae21c.pdf
    • http://stunningsphynxkitten.com/uploads/1/3/0/6/130620573/gexoveb.pdf
    • https://rufebegebe.weebly.com/uploads/1/3/0/2/130271143/bijuwomaxororu.pdf
    • http://bestclinicla.com/uploads/1/3/0/5/130588333/zusesuxofijemupip.pdf
    • http://electrotech.vip/uploads/1/3/0/2/130271017/2156609.pdf
    • http://vexiwa.24olimp.ru/uploads/2020/01/27/tuturaragufozi.pdf
    • http://christianwarnerphotoco.com/uploads/1/3/0/6/130604349/9451323.pdf
    • http://setsdrama.org/uploads/1/3/0/6/130639246/5505443.pdf
    • http://thehappygirlstore.com/uploads/1/3/0/6/130621500/130621500.html#agenda+21+uk+map
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013fd.bin
1f17fe96c6ff902f83430e94d4efdf8730076310962eb976f1908ef8f5871572		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD 9336 bytes
font_01_sfnt_off0000b4b2.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B2 16204 bytes

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