Malicious PDF — malware analysis report

Static analysis result for SHA-256 f15c89cf38dc4f6c…

MALICIOUS

PDF

50.2 KB Created: 2020-08-29 10:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fd1f8004488edd4db42e6b0d866bce5 SHA-1: 33b6c7fe304ca0e7b24f98080a6c559073effc70 SHA-256: f15c89cf38dc4f6c588e8447e02472773af649d465dfacbcbbd0c3ab3e4c94da
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, identified as a PDF link farm. One of these links, 'https://ttraff.ru/wix?keyword=against+the+grain+scott', is flagged as a malicious redirector. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or to distribute further malicious content, aligning with common SEO spam and redirection tactics.

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=against+the+grain+scott
    • https://static.usrfiles.com/ugd/b8c837_321a160ba6674138a1b9479bc20edcbe.pdf
    • https://static.usrfiles.com/ugd/b8c837_d7d62abdaa7d46f190e8ac679db85724.pdf
    • https://static.usrfiles.com/ugd/b8c837_f44beb747a9245f6bf874a2b572fcb98.pdf
    • https://static.usrfiles.com/ugd/b8c837_f23c293ec4514393949cf6601bb91e84.pdf
    • https://static.usrfiles.com/ugd/b8c837_60117dac7607460884c8cc948294237b.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6dc46405b074502859cef609ce0d915.pdf
    • https://static.usrfiles.com/ugd/b8c837_07455a0c5f124140b684133169cf9566.pdf
    • https://static.usrfiles.com/ugd/b8c837_388266d1e4a149579eb303dc257b7374.pdf
    • https://static.usrfiles.com/ugd/b8c837_a68c19e79ac14cc0a1bd0bc883cb7970.pdf
    • https://static.usrfiles.com/ugd/b8c837_c89aa5002c7c46979440d512f1b8fc82.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa89c02855b941628bacb9b8834f225e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a15c2e22735437a9c1be0a284f6b998.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d3b184bea27474bb7197d5c0a753128.pdf
    • https://static.usrfiles.com/ugd/b8c837_49e4b5a698d846f8af01826cd92fdd16.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_off00008710.bin
b2fbc19cf7792ef0d82024c5edd835fc1d0459b130ba022daa2c38ff3da14602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8710 5020 bytes
font_01_sfnt_off00009817.bin
71831a29e989844c25e53ac9911f0273433593d9c27ee6ced4e189037ec73a86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9817 10496 bytes

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