Malicious PDF — malware analysis report

Static analysis result for SHA-256 899c94dacc63d21e…

MALICIOUS

PDF

41.4 KB Created: 2020-08-29 04:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d3ec8af6904379a2b5107699cc9f799 SHA-1: 544b5ecf0d06ab45b39a1534b4cd3d31d10f2da7 SHA-256: 899c94dacc63d21e4a552566b0cc0580846ee8080cd4703c2c9fdc3390bf5d9b
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=2015+uniform+plumbing+code+illustrated+training+manual'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are benign but serve to obscure the malicious one. The document body, though heavily corrupted, contains the same malicious URL, reinforcing its role as a lure.

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/wix?keyword=2015+uniform+plumbing+code+illustrated+training+manual
    • https://static.usrfiles.com/ugd/b8c837_477f3ffc5768402d8ab933cb0032aa9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_676f1336fc424038801eb58346dfde07.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee5d07c5b341415f93131826afc6ad34.pdf
    • https://cdn.shopify.com/s/files/1/0435/1996/7386/files/pharmacological_bioassay.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/68496589936.pdf
    • https://cdn.shopify.com/s/files/1/0432/5680/7586/files/huron_county_sheriff_reports.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/42731516512.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbb6a38463be41ffaa6cf2362d6daef8.pdf
    • https://static.usrfiles.com/ugd/b8c837_080dccfeb0af425a81cff814dfa737ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_d27da58d9334460eb99b253092401374.pdf
    • https://static.usrfiles.com/ugd/b8c837_0afb0f52b8904898960e2504f864322e.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_off00006181.bin
db76b9a873fd788007d98bbabd5686203921b4ef9ad6bdc9e00e1f141b60059c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6181 5972 bytes
font_01_sfnt_off000075a7.bin
02676246eb0abf321d4a7215837a293e0d1f2adad48b6b40c16fb51806133b13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75A7 10292 bytes

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