Malicious PDF — malware analysis report

Static analysis result for SHA-256 f265b80c443d2c60…

MALICIOUS

PDF

34.0 KB Created: 2020-08-30 23:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5448313ce378d0bdf4fa7a497983efd8 SHA-1: a570a77b08a8100ed6508f0a1862830d7787a55a SHA-256: f265b80c443d2c601e91dd93aa4673e8c8b1ef5559d45cae6fc6823c0c8c0703
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, a technique often used to create link farms for SEO manipulation or to distribute malicious content. One of the primary links, 'https://ttraff.ru/wix?keyword=koss+pro+4aa+microphone', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a lure to external, potentially harmful, content.

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=koss+pro+4aa+microphone
    • https://cdn.shopify.com/s/files/1/0433/8489/7701/files/97168767820.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/96901449204.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9434/files/28804379804.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/a_level_chemistry_paper_5_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/0267/4845/files/xulegepizagixe.pdf
    • https://static.usrfiles.com/ugd/09c3c7_46450356b3224218b945952cb836c2d9.pdf
    • https://static.usrfiles.com/ugd/e3ff21_1a2a3aed230e4128860ff5f464f0dbce.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f1532a2c80a424cbfe51b4caba5ce6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_15b571ccc55447868505cbab9e834b35.pdf
    • https://static.usrfiles.com/ugd/b8c837_67223690712b47959c7584093a5416d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3adabb3da63441b94fc10baf91845ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_f869c9e6f1204f20bb41cb2ded25ac0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b0c942838774af2964df5ff3177f97c.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_off0000483c.bin
6f4db939e843f722a6cd30e7cbbd9f9dc5b5ee85957472db23495a9041e630d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x483C 5200 bytes
font_01_sfnt_off000059cd.bin
7632b8bc5c1fe14ae8ac59ff52ef5b28f706e8c15ab5e74723b3fb8ae1cc66dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59CD 9916 bytes

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