Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0742693b705a61…

MALICIOUS

PDF

42.2 KB Created: 2020-08-06 17:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b635249a1375d5e945bb2025d1125ef0 SHA-1: bc2b2427fac14f1344e3dd9efbc46e7e9c5b367e SHA-256: 8f0742693b705a616ff69e4f3e42322cef3b238a5771a09fa83f846b7c2d05ec
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to a link farm designed to host further PDF files. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL that triggers the redirector, suggesting a lure to download malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=practical+law+of+attraction+pdf
    • http://files.bombersdiscs.com/uploads/1/3/0/8/130814127/duwenupatu.pdf
    • http://files.romeprivatetransfers.com/uploads/1/3/1/8/131856108/74e11f899.pdf
    • http://files.iwasasleddog.com/uploads/1/3/0/9/130969963/loxepirajawu-sonona-wujemebaxiruge-womupezuxemax.pdf
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/bogiwabigunurif.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30547733638.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4032/files/60193023602.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/zetuzajej.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/sefedifixiredimenos.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9236/files/98305998458.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7822/files/lukekedarud.pdf
    • https://cdn.shopify.com/s/files/1/0448/0273/6279/files/sql_database_interview_questions_and_answers_for_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/60839915151.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/lagutani.pdf
    • https://cdn.shopify.com/s/files/1/0436/9701/2890/files/jekudufisepasadutidam.pdf
    • https://cdn.shopify.com/s/files/1/0436/2623/4009/files/interview_questions_on_sql_queries.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_off0000670b.bin
90e5a52ad643166ae83bfd28b6abdb2c9b1756d5cbcedf68a2be649617f83ca1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x670B 5064 bytes
font_01_sfnt_off00007868.bin
52f312c6dee0c1f8d439cbf8a9927f92b308bc28a6cd4c6bc6f08c64b6de73d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7868 10756 bytes

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