Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f64295950145b07…

MALICIOUS

PDF

41.3 KB Created: 2020-09-05 23:24:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a50ca3f6a9cb682e9325f3e350c404c SHA-1: 0dc4355813f4871b898b7c952320e3cc41ddac34 SHA-256: 7f64295950145b07c12fb1a413cbd39aca1c7ed8b6bbbc39e3be648564cad981
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 'https://ttraff.club/wix?keyword=que+formatos+lee+kindle+2015'. The document body, though partially corrupted, also contains this URL and appears to be a lure related to Kindle formats. The presence of a large number of external PDF links, many pointing to 'static.usrfiles.com', suggests a link farm or SEO poisoning tactic to distribute the malicious content. No scripts were extracted from this sample.

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.club/wix?keyword=que+formatos+lee+kindle+2015
    • https://static.usrfiles.com/ugd/1f2646_0a81fbd43f66490ea1552681c35225cc.pdf
    • https://static.usrfiles.com/ugd/5c8b2f_e1109c62f82e4633886000bd01f88e5b.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_097ad6de87f148daa30b525647781a1e.pdf
    • https://static.usrfiles.com/ugd/b47706_ce1b330c0fb14db5ae453feecbae195a.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/66695399468.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/58862754775.pdf
    • https://cdn.shopify.com/s/files/1/0432/3888/3485/files/18033542407.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/cadillacs_and_dinosaurs_game_free_filehippo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/90713151524.pdf
    • https://cdn.shopify.com/s/files/1/0447/9113/6422/files/16352675381.pdf
    • https://static.usrfiles.com/ugd/c3f88d_2d03b070318d4c3ea39ffa7655e82ba0.pdf
    • https://static.usrfiles.com/ugd/739437_649bfa459d2c4db9a0493d2962d23caf.pdf
    • https://static.usrfiles.com/ugd/135178_faba82f3082d4513a1cefbd8bce1d7a7.pdf
    • https://static.usrfiles.com/ugd/a43ec6_b38d8f06ba0a447f9a51bb6714e2534a.pdf
    • https://static.usrfiles.com/ugd/0f5b72_7755dd31248d45428a88a9fe96c0142c.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_off0000635b.bin
f19e165923bd3f5073a8afe4f6faaf59356c855896d409e84f9bc3a61dcb6253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635B 5628 bytes
font_01_sfnt_off00007668.bin
1ebe319f38921fd9ea1c0bcb069c74108c36fd111f6b068277f8685bd7d4e50f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7668 10044 bytes

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