Malicious PDF — malware analysis report

Static analysis result for SHA-256 72731ddeb19c97f7…

MALICIOUS

PDF

51.4 KB Authoring application: Mobipocket Creator
MD5: fac0db38600d12610b7f4b2bc9e90728 SHA-1: e4653027e40e49d8d684fb5e99e0195e67e4980c SHA-256: 72731ddeb19c97f7ab39d7155c01cc64467c032c1f6023e6be3ee50184c4f647
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass of external links, identified as a PDF link farm, suggesting a phishing or malware distribution scheme. The presence of a 'download' call-to-action phrase further supports this, indicating the document's purpose is to trick users into downloading malicious content. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall' reinforces the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mgbbsewing.com/uploads/1/3/0/5/130548108/tojemuwufudogorutoj.pdf
    • http://personalizedmerchandize.com/uploads/1/3/0/4/130476390/furavafagapit.pdf
    • http://74-123-79-94.mgwnet.com/uploads/1/3/0/5/130551176/509dc3.pdf
    • http://danielrudin.com/uploads/1/3/0/7/130740368/nizejad-texewesomodej.pdf
    • http://www.llr-t1-coms.com/uploads/1/3/0/3/130323932/7555188.pdf
    • http://boutiqueinsolite.com/uploads/1/3/0/7/130775076/3428048.pdf
    • http://ncballcounseling.com/uploads/1/3/0/7/130739164/fewewofasidiwamokodo.pdf
    • http://simondavidhunter.com/uploads/1/3/0/5/130590164/0e2911403.pdf
    • http://zuludj.com/uploads/1/3/0/8/130815140/1763125.pdf
    • http://mondayswithmike.com/uploads/1/3/0/3/130312926/7020d4d7.pdf
    • http://huangguanzuqiukaihuwang.br3h.com/uploads/1/3/0/6/130640047/130640047.html#salient+features+of+genetic+code+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006422.bin
427f6c024ccd6e6fbaa6eb5df21869d201dcfdc8044ec9d72fd46e6ea4b05dcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6422 2980 bytes
font_01_sfnt_off00007187.bin
e3ca5dd816236f80c62a7a4ca0effe23ae9853b1a640e9cf8e451d008b7bd448		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7187 8964 bytes

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