Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba1ab4924f6f3f7…

MALICIOUS

PDF

37.6 KB Created: 2020-08-28 19:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 417c3f1573181613890105cadc761af4 SHA-1: 0cbf0852128c0d0fc4d37c414ca0e2ef8af90328 SHA-256: fba1ab4924f6f3f7c6e579de54a07c42cd2ae85a99e4e29ff4166324b13a1699
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one pointing to a known malicious redirector (ttraff.ru). The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.ru/wix?keyword=mil+hdbk+454. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of intent beyond link manipulation.

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=mil+hdbk+454
    • https://static.usrfiles.com/ugd/b8c837_32d3486222454cd68abd59b2f62f3870.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6210fa0add848b795733c8bad17d172.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0df0ede68d24257857ef5e4911b38e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_22f20fd1762a4057ae04fd19e1d84c00.pdf
    • https://static.usrfiles.com/ugd/b8c837_893dac0340ab4e1f8b41f172dcd4a74f.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5c65ece9ec046d9ac3410bf74d08111.pdf
    • https://static.usrfiles.com/ugd/b8c837_b54901a16fa140ae866ad1d87633440b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecf87b87e9d6415997fea48b7193cf8d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a96e8acb28fd41e1b6dbd50369af9295.pdf
    • https://static.usrfiles.com/ugd/b8c837_48dfbe299e9a4f2b8cf9536bfa38540c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9dedc56197484533b1324d7af58c9926.pdf
    • https://static.usrfiles.com/ugd/b8c837_42717236b40443d0974665c2105e88a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d2c8329fb094d4db01d7011dc740726.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_off000056ad.bin
071ab5c19065fda4ad7ceaa69ae516c60911603e124d15eca058944009d509e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56AD 4848 bytes
font_01_sfnt_off0000672f.bin
95db17378566c7356112227dd5e3bdb6ddba945c5124653a622980f608619e7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x672F 10360 bytes

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