Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa41be0886fe2c92…

MALICIOUS

PDF

42.5 KB Authoring application: Mobipocket Creator
MD5: 1483effd759dfe5650d7805fb5a39adc SHA-1: b210e914a0608da79a59b2dfe7f2019d6993b32c SHA-256: fa41be0886fe2c92ece72a387a0773b112ae099cb05073b63d67d95ddc3f3633
150 Risk Score

Malware Insights

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

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's high confidence score further indicate malicious intent. The embedded URLs are likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://richardmedina.net/uploads/1/3/0/2/130273944/7134befeb37.pdf
    • http://norcalglad.com/uploads/1/3/0/4/130476215/48f9fcc3a7.pdf
    • http://2019taiwancvcforum.com/uploads/1/3/0/4/130476976/2679854.pdf
    • http://noreenhughes.com/uploads/1/3/0/4/130435702/rutumara_tesib_sejawudetepime_goxovujojixe.pdf
    • http://cfthomas.com/uploads/1/3/0/4/130435721/130435721.html#antonio+vivaldi+allegro+non+molto

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001201.bin
425b66f802e0b63f723341b4fcbbb15a84a54fb13ce37a249fab5fd690460820		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1201 7992 bytes

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