Malicious PDF — malware analysis report

Static analysis result for SHA-256 c003ed6877fbe014…

MALICIOUS

PDF

68.2 KB Created: 2020-08-14 23:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d3634da15cd8641378857b1dd9bfbbd SHA-1: 798214dc1c6de588332d63131f31f5366732734b SHA-256: c003ed6877fbe01426513fd3dbf40a26d4d04ab141fff48bfde6f39fb1518527
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wb?keyword=tendinitis%20cubital%20posterior%20pdf'. This indicates the document's primary purpose is to lure users to a potentially harmful external site. The file also exhibits characteristics of a PDF link farm, with numerous embedded links, further supporting the malicious redirection intent. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious URL is a strong indicator of malicious activity.

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.ru/wb?keyword=tendinitis%20cubital%20posterior%20pdf
    • http://pikadopim.karinkopischke.com/uploads/1/3/1/4/131452954/nujukiwes.pdf
    • http://kosuturo.thebankofguns.com/uploads/1/3/1/8/131871991/747358.pdf
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/81191015616.pdf
    • https://cdn.shopify.com/s/files/1/0436/9262/1978/files/counselling_skills_and_theory.pdf
    • https://cdn.shopify.com/s/files/1/0434/1311/0951/files/91560507382.pdf
    • https://cdn.shopify.com/s/files/1/0437/5665/0645/files/psicologia_de_aprendizagem_social.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/23364470425.pdf
    • https://cdn.shopify.com/s/files/1/0434/1963/1765/files/21464354619.pdf
    • https://cdn.shopify.com/s/files/1/0433/2063/9646/files/canalisation_electrique_cours.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/testi_e_accordi_canzoni_napoletane.pdf
    • https://cdn.shopify.com/s/files/1/0434/3968/5799/files/basics_of_photography_dslr.pdf
    • https://cdn.shopify.com/s/files/1/0434/2431/7596/files/logijefofilatobudew.pdf
    • https://cdn.shopify.com/s/files/1/0433/5920/7592/files/lafovugi.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_off0000cc86.bin
1e3e0c642c64a47467ef9bd1948f931d10280b0720bcf2a3dbfe9a4866cabf2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC86 5236 bytes
font_01_sfnt_off0000de55.bin
f4be797172338d1065f35327c54239de7e1ff9d024e84dece75a5e0440795d89		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE55 11012 bytes

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