Malicious PDF — malware analysis report

Static analysis result for SHA-256 2980a185df4ec443…

MALICIOUS

PDF

40.8 KB Created: 2020-08-30 06:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3da6b7bcf9e243263747e57a8b87efd SHA-1: ce67f4043e1708cd7e132b396a4ecde32e3987d2 SHA-256: 2980a185df4ec44394e175854d70b3b4db13af8dd7e455a99d6d883168dfeb2f
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many pointing to Shopify-hosted PDF files, which is indicative of a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious payload delivery mechanism. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine the exact lure.

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.cc/wix?keyword=latest+interview+pervez+musharraf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/furedumolijutuvero.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/48352374408.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/36835031047.pdf
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/93298982908.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/post_gastrectomy_complications.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4885/files/48361709478.pdf
    • https://cdn.shopify.com/s/files/1/0440/1568/1701/files/lepibuwabomavo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0063/5290/files/fivade.pdf
    • https://cdn.shopify.com/s/files/1/0465/0247/7982/files/la_dame_de_haute_savoie_tab.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f625cbcf4794ec5883a050d4165a7bc.pdf
    • https://static.usrfiles.com/ugd/362633_e9bfe5b40cd843d1a0e878227dceb36b.pdf
    • https://static.usrfiles.com/ugd/a2c2bc_6d5e00d0d9f54a3587166d81bd854563.pdf
    • https://static.usrfiles.com/ugd/91e123_3239486b1e644234a065414783141008.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_off00006148.bin
eb31d799a92946e3909c0f204e5ae02c585278a602bb6800b4db5dfa5df2aa65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 5252 bytes
font_01_sfnt_off0000731a.bin
f5f08602f177919a1c1847db422bb65e2937ed44b2fb8296d34830232961ffe9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731A 10432 bytes

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