Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f22733ca820d497…

MALICIOUS

PDF

42.1 KB Created: 2020-08-05 11:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f5b2fb95981293b3363a43abc78b82c SHA-1: e627e76cc74763c1c2b72c294b5497e6d096be66 SHA-256: 7f22733ca820d4977c65fbc31955289d828a60d3039e281fdfbeb76d4391af27
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO poisoning. One critical heuristic indicates a malicious redirector link to 'ttraff.cc', which is likely used to obscure the final malicious destination. The document body contains garbled text but also includes the URL that triggered the malicious redirector heuristic, confirming its presence. No scripts were extracted, but the primary attack pattern involves luring the user to click on a malicious link.

Heuristics 3

  • 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.
  • 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://ttraff.cc/pify?keyword=bestiariusz+s%25C5%2582owia%25C5%2584ski+pdf
    • http://files.foxfiregalleries.com/uploads/1/3/1/8/131856446/gulidaxas-zurasa-tetidafuxizi-kelila.pdf
    • http://files.dorkygringo.com/uploads/1/3/2/7/132710491/jupesibekokibo.pdf
    • http://files.firstlutheranpreschoolec.com/uploads/1/3/1/4/131406082/7026437.pdf
    • http://files.ewalkthrough.org/uploads/1/3/1/3/131379792/03dc0.pdf
    • http://files.languageartswitmsbell.com/uploads/1/3/0/7/130776037/37690.pdf
    • https://cdn.shopify.com/s/files/1/0430/5823/3493/files/sumasaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3440/2216/files/eating_plan_for_high_cholesterol.pdf
    • https://cdn.shopify.com/s/files/1/0430/5613/6341/files/29792147970.pdf
    • https://cdn.shopify.com/s/files/1/0430/4958/2743/files/71156772256.pdf
    • https://cdn.shopify.com/s/files/1/0433/6055/1070/files/sogenivorivonixu.pdf
    • https://cdn.shopify.com/s/files/1/0451/1285/2632/files/psicologia_autoconhecimento.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/8208550153.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/57644613547.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/48050564511.pdf
    • https://cdn.shopify.com/s/files/1/0432/4127/5547/files/46226520585.pdf
    • https://cdn.shopify.com/s/files/1/0435/9153/2699/files/61288158151.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_off00006362.bin
7fbcc895a619394d7a47d2f13900c8613c34bb6f0526efacaff7129a6cfda104		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6362 5440 bytes
font_01_sfnt_off000075e2.bin
a19bc91c633aff827969ac84affe57944ac902c0afdb7aeceabba6373c84dc10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E2 11356 bytes

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