Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a3f9c919c7aad8…

MALICIOUS

PDF

37.9 KB Authoring application: PDF Studio
MD5: 0ae78b88a3bbfc458f72f75341034342 SHA-1: 448be01407bd130534ff031925c16705a8ce0b11 SHA-256: a4a3f9c919c7aad839a5ea7824fc4465c6c04a8b9ee83648fea94819526af8ca
150 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.TtraffRobotInstall-7605656-0 and a machine learning classifier indicated a high probability of maliciousness. The PDF contains a link farm with multiple embedded URLs, suggesting a redirection or download mechanism. The document body, though partially corrupted, contains text related to maps and locations, likely a lure to disguise the malicious intent of the embedded links.

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://doveyjunction.org/uploads/1/3/0/6/130604497/5654141.pdf
    • http://bijis.bara-bum.ru/uploads/2020/01/28/lawewepub-zejelobopi-pitedirusuzadir.pdf
    • http://nezip.el1t.ru/uploads/2020/01/28/0f0aef6fd5a8.pdf
    • http://gwenjacksonstories.net/uploads/1/3/0/4/130436244/90e1250d1cd.pdf
    • http://mhrandlenovels.com/uploads/1/3/0/5/130545021/130545021.html#mapa+de+chiapas+carreteras

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010a4.bin
b1c0d216303a54d58391775b05588f859aafa78fb77e73a19a764a818b351554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4 9396 bytes

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