Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c02f79ecf8cbbd9…

MALICIOUS

PDF

42.3 KB Authoring application: QPDF
MD5: 398f04fd2d587f701dc746d9017b253c SHA-1: 64b9c607fb19f0016d4b064d57a5d7af5b2ee50d SHA-256: 0c02f79ecf8cbbd9f740b6f6c3ed0bae737cec46c8ebf018339a3604de336390
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 by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 and the ML classifier output strongly indicate malicious intent. The embedded URLs are likely used to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vikikuvab.audiostart14.icu/uploads/2020/01/29/5341b6.pdf
    • http://mmflackdesigns.com/uploads/1/3/0/7/130740592/5170542.pdf
    • http://bestmassagescottsdale.com/uploads/1/3/0/2/130289551/2241348.pdf
    • http://bsa-sccc-pack301.com/uploads/1/3/0/7/130740589/130740589.html#engagement+invitation+templates+for

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000fb5.bin
b341cf915eaff8000e54bf2525a8dac2f9348a5c802fc66108cda48a816f174a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5 8168 bytes

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