Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b6de06f8484138b…

MALICIOUS

PDF

40.5 KB Authoring application: Mobipocket Creator
MD5: 5b243e2b4b1f0559b92c14da8443168d SHA-1: 0f4ddd0dfd01e0e38c68cb3df6fe4ea08c921977 SHA-256: 0b6de06f8484138b6d1b44e8674d3d5b52fd0e3c00942dc4288bcce32394fc0b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique commonly used for phishing or distributing malware. ClamAV detected this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a critical heuristic identified it as a 'PDF_SEO_LINK_FARM'. The embedded URLs are the primary indicators of malicious intent.

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://sakninhna.com/uploads/2020/01/28/jakufamoromonanafi.pdf
    • http://crowdtrends.com/uploads/1/3/0/6/130604498/livepitavadaropebu.pdf
    • http://dafami.darkempires.ca/uploads/2020/01/29/rifivozuset-niwibatapibi-metopewase.pdf
    • http://cycotron.com/uploads/1/3/0/4/130488101/3683840.pdf
    • http://mynaturalhairspa.com/uploads/1/3/0/2/130288626/4527348.pdf
    • http://mathiasscarborough.com/uploads/1/3/0/5/130540077/mukenekakiz.pdf
    • http://crablefoundation.org/uploads/1/3/0/7/130739860/pinudulak.pdf
    • http://edgelandscapeandmaintenance.com/uploads/1/3/0/5/130545334/130545334.html#mechanism+of+cardiac+muscle+contraction+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000115f.bin
b593cdced359e6807a4e03baa6b34afe2b0e5856a76095830120e5433eee2df6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115F 8184 bytes

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