Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c03b60579965c57…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 12:21:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f538952973a199e06dee7f2800a556c SHA-1: 1c78ca885da1cc32bbdd5813770784ca25a9f9a7 SHA-256: 8c03b60579965c57e15b95a0230de27953eac2be869ee5388bfd75a03387f0e3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was identified as malicious due to the presence of a link to a known malicious redirector, ttraff.ru. This heuristic, combined with the PDF SEO link farm detection, suggests the document is part of a campaign to distribute malicious content. The embedded URL likely serves as a lure to a phishing or malware download page.

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=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D1%2584%25D0%25B0%25D0%25B9%25D0%25BB+%25D0%25BB%25D0%25B8%25D1%2586%25D0%25B5%25D0%25BD%25D0%25B7%25D0%25B8%25D0%25B8+%25D0%25B4%25D0%25BB%25D1%258F+%25D0%25B0%25D0%25B2%25D0%25B0%25D1%2581%25D1%2582+secu
    • https://static.usrfiles.com/ugd/b8c837_4b686685de604f7a9cf67d3588a41c96.pdf
    • https://static.usrfiles.com/ugd/b8c837_9522a37077854400a4d90deb1b986093.pdf
    • https://static.usrfiles.com/ugd/b8c837_59949572ef224a429e28f6d3bc829e4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_360d42865a664558a9187ed25d39b29b.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2a0d872d3a7454e8ce9df9342e8e8b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_821a8df385214f2a9ff727f0510777f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5751e6bda844f2b8fa809d0d9be069e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2dd31e295c840e3af053e1176413e6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e02d159814f48ccad7b6ad8e4ef7be0.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0bb93717ae547a483ecad8353f8e0f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_827273defede44d1b6180b8bfe373ef4.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_off000055ed.bin
dc870f5bb728fc0267fd022b25bb60d6b3750c6373ec3a621c33e33a1898554b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55ED 6336 bytes
font_01_sfnt_off00006a96.bin
f804d93a25380c25300f3cf9785812ff85b242a265ab9ebe7e498df0ddf40b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A96 16048 bytes

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