Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2d4e58d0f685487…

MALICIOUS

PDF

50.0 KB Created: 2020-09-08 09:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c436afa18acb651ccd64dc8c22040a84 SHA-1: 5d7ce990902eb6af1de617ca97be37c1e74a05ed SHA-256: a2d4e58d0f685487539ab25d79dc1e06d3431f21745d50260a6cd5deedea709e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links, many pointing to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting an attempt to trick users into clicking the link. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=smartart+puzzle+pieces+powerpoint+template
    • https://static.usrfiles.com/ugd/e2f197_a74e11e870d248d1b5598d0bfc7857df.pdf
    • https://static.usrfiles.com/ugd/05900a_2beb7200b8454399b7f08ccd56cd0d04.pdf
    • https://static.usrfiles.com/ugd/decf6f_73c5a3e45cdc4aa18b4a3bf52c09db36.pdf
    • https://static.usrfiles.com/ugd/b8c837_d05f0c953a8b45b883990788c19958dd.pdf
    • https://static.usrfiles.com/ugd/7ff653_28c4f5296f8f436bb201764fb25a682a.pdf
    • https://static.usrfiles.com/ugd/7d21c0_55bc85259e4d444bb8b32041102d68f1.pdf
    • https://static.usrfiles.com/ugd/8acad3_cb9f0c14396b439a8d57b573f5bae7e2.pdf
    • https://static.usrfiles.com/ugd/0286dd_37014a8d0e844d16986a7baeac0fdf36.pdf
    • https://static.usrfiles.com/ugd/269bb8_096056824ec341309753919e71573168.pdf
    • https://static.usrfiles.com/ugd/cf79db_ddaf070273af49da9a430be9adf9719c.pdf
    • https://static.usrfiles.com/ugd/a640e9_4eb934d504544bb390e7e1cfac92acdb.pdf
    • https://static.usrfiles.com/ugd/d38238_6028f683d9894cf99b1fe0857c5c45f1.pdf
    • https://static.usrfiles.com/ugd/77eba6_99136e0f371949429c16fd61aacee282.pdf
    • https://static.usrfiles.com/ugd/ce5d00_4d6334c8cda4482fbdf0a7acb7c6132d.pdf
    • https://static.usrfiles.com/ugd/fedf23_7d1c9d107aa042b282d5e6e7fad7a565.pdf
    • https://static.usrfiles.com/ugd/8de238_09433017403f4564a3a92fae67b3e279.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_off0000854f.bin
683880233a5abf4028816d80cc842ff6e68a3dfeecedc670114f63d69df90a84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x854F 5324 bytes
font_01_sfnt_off00009765.bin
eaece5b8b7ff49863ffccbf42fe360010b3e2b4da0b8f0ddd9f203a714a79516		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9765 10264 bytes

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