Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f546dd44bb6c228…

MALICIOUS

PDF

35.1 KB Authoring application: OpenOffice Draw
MD5: c08d2a2a735cd06c0e211ec6cc9571ce SHA-1: 3010cbc620b73df2df3f5057a2dd73b4de069885 SHA-256: 6f546dd44bb6c22811e3b1cdc8fdca489171e4baaf040600bd7d4883166ed3cc
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to distribute further malicious content. ClamAV detected this as 'Pdf.Phishing.TtraffRobotInstall-7605656-0', and a machine learning classifier also flagged it as malicious. The document body is heavily obfuscated and contains no clear textual lure, but the sheer volume of external links suggests a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://samuelprovencher.net/uploads/1/3/0/5/130590367/gokebavubowir.pdf
    • http://skillsuccesspremium.com/uploads/1/3/0/5/130590410/luserar.pdf
    • http://neuracing.com/uploads/1/3/0/3/130379362/f70e2.pdf
    • http://mike4congress.com/uploads/1/3/0/6/130640110/mobinebupisilo.pdf
    • http://roadiesrule.com/uploads/1/3/0/6/130622051/427e046d.pdf
    • http://smokeytrout.com/uploads/1/3/0/6/130620910/4b101cbad3aa.pdf
    • http://beyondhillco.com/uploads/1/3/0/6/130620230/130620230.html#abruptio+placentae+medications

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003623.bin
3e1368f3fe33c862c5ab5166e3363c310b9f475b7cbaaf5d1357e4d68e6e7ab6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3623 8304 bytes

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