Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d9511053462e2cd…

MALICIOUS

PDF

38.4 KB Created: 2020-08-28 08:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76f91a828fe3dd7d78a1fb074d22355b SHA-1: 4cbb27eafbcf9ce1788f405853ff7c251ad56bc4 SHA-256: 8d9511053462e2cd2537b68f868c869a9360f7e5ba45ac12a404659102a4156d
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm containing numerous external links. One of these links, 'https://ttraff.com/pify?keyword=10.+kalk%25C4%25B1nma+plan%25C4%25B1+%25C3%25B6zeti', points to a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to distribute malicious content or phish users.

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/pify?keyword=10.+kalk%25C4%25B1nma+plan%25C4%25B1+%25C3%25B6zeti
    • http://wolofusul.rebekahsilver.com/uploads/1/3/1/4/131452903/dac947279b91.pdf
    • https://cdn.shopify.com/s/files/1/0437/4573/8903/files/airnav_pro_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/toxoditizotipogulowoji.pdf
    • https://cdn.shopify.com/s/files/1/0435/6043/5873/files/21188918817.pdf
    • https://cdn.shopify.com/s/files/1/0438/6432/6309/files/wademifelefu.pdf
    • https://cdn.shopify.com/s/files/1/0447/1622/8761/files/absorption_costing_vs_activity_based_costing.pdf
    • https://cdn.shopify.com/s/files/1/0435/6099/2927/files/99064528488.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/gezasixof.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/vogixulenax.pdf
    • https://cdn.shopify.com/s/files/1/0437/0651/5611/files/39072093290.pdf
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/rubulevarabefenagopejomaz.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_off00005698.bin
20385a5f5acecbf436d9aa7f5d0543714f40709a694f08b20ef5905081c4c6c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5698 5108 bytes
font_01_sfnt_off000067ad.bin
42d7d93f05d57df59a9ccc3c40fdb56b65f7df6648d31f3475e3098277723bfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67AD 11500 bytes

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