Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb9139ea344f7333…

MALICIOUS

PDF

38.9 KB Created: 2020-10-09 14:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2cb5cbf24c7d738dafb0459c8387632 SHA-1: 22f4ba40f37a8082e16515b447a23c0ca102d68d SHA-256: cb9139ea344f73338228548b71eb46e9df19853d7fd032bc0b16fec22bbcfcba
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. Another heuristic indicates a PDF link farm, suggesting a tactic to distribute malicious content. The presence of a download button lure further supports a phishing or scam attempt. No scripts were extracted, but the link analysis strongly suggests a malicious redirection workflow.

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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 https://cctraff.ru/strik?keyword=set+up+ooma+telo
    • http://files.wapisfortheworld.com/uploads/1/3/1/3/131379268/visevepe.pdf
    • http://vekegok.girlytingz2.com/uploads/1/3/1/3/131379578/jebiwuv.pdf
    • http://files.chowfoodandbeverage.com/uploads/1/3/1/4/131437107/1813480f.pdf
    • http://zusemanag.brurosa.com/uploads/1/3/1/4/131438304/lefetudi.pdf
    • http://files.freerangebird.org/uploads/1/3/1/1/131164199/fifek.pdf
    • https://uploads.strikinglycdn.com/files/5a0474a2-3ab4-4e3a-876f-6fb5de28c75a/98505416862.pdf
    • https://uploads.strikinglycdn.com/files/1638ab0e-435b-413b-85fc-5465a4e47fc3/kagusifufobote.pdf
    • https://uploads.strikinglycdn.com/files/70f9d38d-d0f3-437f-9c79-9db0969c8803/pekazoxopip.pdf
    • https://uploads.strikinglycdn.com/files/57dceda3-959e-4c01-8a34-d0664765c3ae/mevudemexawiwatoduxonim.pdf
    • https://uploads.strikinglycdn.com/files/f49d567e-fe55-409d-94eb-a5c3daefc602/tixudawapolisezo.pdf
    • https://uploads.strikinglycdn.com/files/537e51ba-d7a0-45be-a902-bd740c572574/xadix.pdf
    • https://uploads.strikinglycdn.com/files/bbf4add6-38a5-48bd-b08a-347533e2f411/lekejukaliw.pdf
    • https://cdn.shopify.com/s/files/1/0484/0341/5208/files/mitchell_elementary_school.pdf
    • https://cdn.shopify.com/s/files/1/0502/9992/8741/files/3958444904.pdf
    • https://cdn.shopify.com/s/files/1/0461/8197/4169/files/uf_student_gardens.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ce6.bin
f48bf1f88538caf5eeb2668597c31aa052e28034f51223864cdfdcfc53f7210c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE6 4796 bytes
font_01_sfnt_off00006d21.bin
66965c043e11b65a29881ff49de89ab9f2168be4f062d6bd21104a2c6ffde08c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D21 9956 bytes