Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f6690b5a07a2cb4…

MALICIOUS

PDF

43.2 KB Created: 2020-08-31 08:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 629e63e54da0a7f9d61c68d7c4e8f3c6 SHA-1: 6ab4af1439ae1dc34768aff2d24984aa335c9bc7 SHA-256: 2f6690b5a07a2cb4cc316fe516d8e91c7d5563ec88299f221a1ff494bfa142b1
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a malicious redirector link. The document body contains numerous embedded URLs, with a significant portion pointing to static.usrfiles.com, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.ru/wix?keyword=infj+personality+traits, which is flagged as a redirector. No scripts were extracted from this sample.

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/wix?keyword=infj+personality+traits
    • https://static.usrfiles.com/ugd/b8c837_6d397ffd1d1e4525ad133c0691dc4ed4.pdf
    • https://static.usrfiles.com/ugd/6c032c_481ed177aa5247508a989a6cec72ada9.pdf
    • https://static.usrfiles.com/ugd/b8c837_43cfc2a5113842e4b04da51788aeff86.pdf
    • https://static.usrfiles.com/ugd/ec0c41_4551eb2f436f4a03a93fb7c04002fe67.pdf
    • https://cdn.shopify.com/s/files/1/0433/4940/9960/files/8955251568.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8554/files/51391220194.pdf
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/turunexovoga.pdf
    • https://static.usrfiles.com/ugd/b8c837_42f546c2cd7845dba95f46381acebb02.pdf
    • https://static.usrfiles.com/ugd/affb4a_91ddbc3aa2884192845ece7b52b9db6e.pdf
    • https://static.usrfiles.com/ugd/4bb894_c3f72db7039947d18824115a5146db55.pdf
    • https://cdn.shopify.com/s/files/1/0434/8179/2664/files/29433392366.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5524/files/korozikirifupetutugij.pdf
    • https://cdn.shopify.com/s/files/1/0431/6348/4315/files/kozazifutezoviwom.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_off00006eb0.bin
5d52a5511e48ff6b04b9f385d63df23d0e3df5a19217600a163bec0929f628c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB0 5012 bytes
font_01_sfnt_off00007fd2.bin
f09c68713fbd8fc3f89512188c057a2a5662665666b096e32a9f4cb9abc8619c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD2 9388 bytes

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