Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3f731f73f6c6b9…

MALICIOUS

PDF

28.9 KB Authoring application: Smallpdf Desktop
MD5: 73a31c6490ca4e9d3a8d6f8daaa7e029 SHA-1: 5a51d084a5462a691e09febd2b7a1d25acc2b534 SHA-256: 1b3f731f73f6c6b9b7ceeb5d7f9601a966c61dea076ab8c9863d7fecdb956bd7
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though corrupted, also contains these URLs, suggesting a deliberate attempt to direct users to external resources. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic-driving intent. No scripts were extracted from this sample.

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://jenjacobsarchiving.com/uploads/1/3/0/5/130588570/4ae8deb042.pdf
    • http://camping-graesselmuehle.de/uploads/1/3/0/5/130588942/3787320.pdf
    • http://insidedentalequipment.net/uploads/1/3/0/2/130287401/a88864f4b1.pdf
    • http://selbysummershootout.com/uploads/1/3/0/5/130588924/347707.pdf
    • http://adriftwoodworks.com/uploads/1/3/0/6/130640095/67557641668d.pdf
    • http://texstyle.ca/uploads/1/3/0/6/130605040/6106115.pdf
    • http://salftom.store/uploads/1/3/0/7/130739139/5032d5.pdf
    • http://twinitron.com/uploads/1/3/0/4/130477146/7066311.pdf
    • http://remotetravels.com/uploads/1/3/0/6/130620337/bilakabob.pdf
    • http://26and2.club/uploads/1/3/0/4/130483737/fadazik.pdf
    • http://resurfacetechnology.com/uploads/1/3/0/6/130621776/kogofovot.pdf
    • http://teamsellabrate.com/uploads/1/3/0/7/130776873/sovamobidevunu_dimalajelipe_giwovozisi.pdf
    • http://www.geauxswimminglafayette.com/uploads/1/3/0/6/130639609/silamezilan.pdf
    • http://pruittconsulting.org/uploads/1/3/0/7/130776321/18b002f6.pdf
    • http://woohoothings.com/uploads/1/3/0/5/130550955/ruwibex-zemapesa-modabufubilip.pdf
    • http://solopianostylings.com/uploads/1/3/0/7/130776143/8e77b.pdf
    • http://zrvcgh.bdgct.com/uploads/1/3/0/5/130540176/130540176.html#geometry+congruent+triangles+review+worksheet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000018d4.bin
d41de40bd9cd0ce023a574dafe480ea1b1b83bb2625b04b680eb2d41cc22d41d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18D4 6368 bytes

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