Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc9f93ad6f31c96…

MALICIOUS

PDF

36.1 KB Created: 2020-09-02 02:57:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ae4f42fec6e700ca862af0269a4f799 SHA-1: 6325c953029ed4ae061661e6b009307c89149299 SHA-256: 1fc9f93ad6f31c96b1591dc657713edb0299ceb9db9974608651c01337ecd535
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, directing users to a URL associated with malicious activity. It also exhibits characteristics of a PDF SEO link farm, with numerous embedded links. The document body, though heavily obfuscated, contains the text "Coliform count plate interpretation guide" and the malicious URL, suggesting a lure to a malicious site.

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/pify?keyword=coliform+count+plate+interpretation+guide
    • https://cdn.shopify.com/s/files/1/0459/8916/7266/files/26934375872.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/82664358738.pdf
    • https://cdn.shopify.com/s/files/1/0435/8848/5288/files/roblox_troll_script.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1409/files/famiribaxexunobelezeroko.pdf
    • https://static.usrfiles.com/ugd/b18e4d_69de3e1c7acf41b2ac1ec774c1f1636d.pdf
    • https://static.usrfiles.com/ugd/afe78f_5a069fa042c74b35b69662f0026eda73.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d7cf7449f994085882a662e3ea1e713.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ee62c131f8448449de202204ebdcb1c.pdf
    • https://static.usrfiles.com/ugd/957c7b_bf4d49c00a67410b86389dc1aa5c61d2.pdf
    • https://cdn.shopify.com/s/files/1/0430/0144/6554/files/73220995291.pdf
    • https://cdn.shopify.com/s/files/1/0429/7873/8335/files/32777204586.pdf
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/sokel.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6250/files/contingency_approaches_to_leadership.pdf
    • https://cdn.shopify.com/s/files/1/0430/0177/4233/files/evergreen_bollywood_movies_free_for_pc.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_off00004eff.bin
135a572e2f88692e32481ca4fc5b3304d38a2b0ec0c67d0867fe250cc4199913		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EFF 5204 bytes
font_01_sfnt_off0000609b.bin
edb11488d7e2c949b488e4953e7fc2c4af57bcc81421f7dd391cfc7d2cf6e8d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609B 9676 bytes

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