Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ad6b77df7c972bc…

MALICIOUS

PDF

41.4 KB Created: 2020-08-29 23:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f64cbb27d925a5783cc7063823a0d2f SHA-1: 65a5d48e23c3e3d6f709558a1a13facf7025fd72 SHA-256: 4ad6b77df7c972bc24a3fa15a6634829a558d20b8e1a52ffca78bf432bdc1198
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in

The PDF document contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=morsomme+sitater+om+fredag+den+13.'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, many of which point to shopify.com and static.usrfiles.com domains. The document body, though partially corrupted, contains the same redirector URL and several benign-looking PDF links, suggesting a lure to a malicious site.

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=morsomme+sitater+om+fredag+den+13
    • https://cdn.shopify.com/s/files/1/0458/1163/0246/files/22468996497.pdf
    • https://cdn.shopify.com/s/files/1/0428/7817/3351/files/57470606364.pdf
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/73116352967.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/79565498223.pdf
    • https://static.usrfiles.com/ugd/b8c837_daf709f4c772486cbde61e62e75b0001.pdf
    • https://static.usrfiles.com/ugd/b8c837_31dbd8fa2f504700938b1a38cfc66fb1.pdf
    • https://static.usrfiles.com/ugd/b8c837_e63a33f508754923bdda1c87aa9d44a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_20e37c5d833c42aeb7bbb095db66a8da.pdf
    • https://static.usrfiles.com/ugd/b8c837_ca2c50b8336a48feb72c3976f7b9a19c.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f022ecf139f491995cd4ceceae10c07.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf171a5ef2d744f5b6df74b9ed201237.pdf
    • https://static.usrfiles.com/ugd/b8c837_cf2baedd52d342768e7f4a112c75b1cd.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_off00005f69.bin
0d660fe2d2f93079b03707ed73e4d833e165b9a146553d3cf07ad6d070719c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F69 5448 bytes
font_01_sfnt_off000071f2.bin
168254859df5fc6f4c2aa903266c5bc04cec9c36c9c1461a3af58b642ff690cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F2 11344 bytes

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