Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d61049fd414c3d4…

MALICIOUS

PDF

42.4 KB Created: 2020-08-31 19:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfb3b6241dd7e700bd2f2ae90b227227 SHA-1: 36426afd91a32425e58e78a44ce1a948ceb97faa SHA-256: 4d61049fd414c3d44679a2d7dbdfd294f91370cfc36fdb45847d6b0d0c5b928d
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'Keurig apple cider nutritional information'. The presence of numerous external PDF links also suggests a link farm or redirection tactic. No scripts were extracted, limiting the analysis of specific execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=keurig+apple+cider+nutritional+information
    • https://static.usrfiles.com/ugd/b8c837_a932183e82f7499681b2072342856939.pdf
    • https://static.usrfiles.com/ugd/b8c837_3feab1d4884540a9aa308b41debaf98c.pdf
    • https://static.usrfiles.com/ugd/fbccce_bcddb7b210394c658ffd6cb38aefb545.pdf
    • https://static.usrfiles.com/ugd/696117_3a8b2992c0c54a2a818204160315d7a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_73d299d862fd4e2e9863d1280a5e008d.pdf
    • https://static.usrfiles.com/ugd/a48928_22c4691c21c74039a385da1bd874d5b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b9914fffc674e13b6aa25db6f39a34d.pdf
    • https://static.usrfiles.com/ugd/7f16bd_9f9e175c1c4e45f192d9ee45d58e80ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_1073030cb9ce4967b507e0c6be339a63.pdf
    • https://static.usrfiles.com/ugd/8b49c6_ef7666c1019a4aafbd92c4525fa6a844.pdf
    • https://cdn.shopify.com/s/files/1/0429/3630/3782/files/40750085023.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7622/files/1683591852.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_off000067ab.bin
34fc7be46dc7279d7c6ef6ab8945bc47a0e93c3f583efa7941fb55538fe3c1d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67AB 5264 bytes
font_01_sfnt_off0000798b.bin
007cdbd3ccc2286f18e4c741bb4d70296ae5d5614db40b4c4fd3e2497a194cf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x798B 10292 bytes

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