Malicious PDF — malware analysis report

Static analysis result for SHA-256 1967e82ea5d19b2a…

MALICIOUS

PDF

33.3 KB Authoring application: SWFTools
MD5: 9e840e0641243962402e017c602a6f2d SHA-1: a1590a954b8404d147513a93796fae86167e0d7f SHA-256: 1967e82ea5d19b2aeccc70c8403dbee2312954e33dfb10d1be23f0f70ce5923c
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'link farm', which is a common tactic for SEO poisoning or distributing malware. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.TtraffRobotInstall'. While no scripts were explicitly extracted, the embedded URLs are the primary mechanism for the attack, likely leading to further malicious content or phishing pages.

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 https://majabuxomisivi.weebly.com/uploads/1/3/0/6/130605442/sapaleraxe-rizin-navigenafevuv-kivotino.pdf
    • https://lidiziluxafumem.weebly.com/uploads/1/3/0/4/130436033/wulamagub.pdf
    • http://meschersky.com/uploads/2020/01/27/wawikuxokupigepaw.pdf
    • http://gikidosoje.aloui.online/uploads/2020/01/28/6b8e0.pdf
    • http://mebo.klais.ru/uploads/2020/01/27/5231551.pdf
    • https://petosuvas.weebly.com/uploads/1/3/0/5/130539329/7623943.pdf
    • https://xumumegujexipak.weebly.com/uploads/1/3/0/6/130605355/rijubevulageja.pdf
    • https://puwanewipimope.weebly.com/uploads/1/3/0/6/130604373/1498c876.pdf
    • https://morarafaf.weebly.com/uploads/1/3/0/5/130590224/130590224.html#boron+trichloride+octet+rule

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001198.bin
7f4624149a27496854ef3756016294f31fe16e011f4eb6695fcb4c9be14b474d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1198 7876 bytes

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