Malicious PDF — malware analysis report

Static analysis result for SHA-256 7feb5a23e9179e3b…

MALICIOUS

PDF

41.4 KB Created: 2020-08-29 15:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffddc2f45c76820ce02822a3b4433a4e SHA-1: dcaf21944a2638f22387608aabe527fe9472372f SHA-256: 7feb5a23e9179e3bfc605179b6bd1b780775b2c773dfe32863a38fa5e87d6151
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=1998+mercury+225+efi+owner%2527s+manual'. This indicates a social engineering attempt to trick users into visiting a malicious site, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains references to the same URL and other PDF links, reinforcing the lure. The presence of a link farm heuristic further suggests this document is part of a larger SEO poisoning or link farm campaign.

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=1998+mercury+225+efi+owner%2527s+manual
    • https://static.usrfiles.com/ugd/b8c837_823c07329320432d8a986852a2fd08fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e7a4bebcde24c5bb37706e604b3668f.pdf
    • https://static.usrfiles.com/ugd/b8c837_94ebdc909c7447589fc4695df380f5fd.pdf
    • https://static.usrfiles.com/ugd/12f4eb_3cadc3c939444300b6fc3025233daf42.pdf
    • https://static.usrfiles.com/ugd/b8c837_db3c08653dbf460793325522e1576ce8.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6846/files/44793648675.pdf
    • https://cdn.shopify.com/s/files/1/0430/2887/3367/files/demidis.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f5bd3672fd04c2cb623c5c4069d3481.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3cddb0cad2f4dfdb061d0873098eabd.pdf
    • https://static.usrfiles.com/ugd/d54300_5b476593d00540079ac2161485cd455f.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_off00005b63.bin
ce884931b6856d58674ad8a908d035619bc649442b5b5e31d180c14be14d1d64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B63 5820 bytes
font_01_sfnt_off00006f3b.bin
5f4fe56e2e9a41444213e8026bb73a8c072b9ec4445f6fbba9a8f17b87fa3583		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3B 13456 bytes

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