Malicious PDF — malware analysis report

Static analysis result for SHA-256 54fd5853187ce9ce…

MALICIOUS

PDF

57.2 KB Created: 2020-08-10 01:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fd15d6dcbe669909bb65bb8f141cb0f SHA-1: 3541bdc0a6aea65efd74f4f173f8a96bb3b050c2 SHA-256: 54fd5853187ce9ce7a9b18feb8b3931b8f2e95d75e7a41ed747e7c13113ff3cc
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=the+causes+of+bantu+migration+pdf'. This suggests the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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=the+causes+of+bantu+migration+pdf
    • http://files.crewilliams.net/uploads/1/3/1/6/131636678/8400560.pdf
    • http://files.ridertransformation.com/uploads/1/3/1/1/131164273/gefedejefepes-begibase-jaror-roxubanetuzokir.pdf
    • http://files.letschangeourcity.org/uploads/1/3/1/0/131070051/walejurozibamunixizo.pdf
    • http://files.stuartpeterman.com/uploads/1/3/1/6/131606434/84ea15892.pdf
    • http://dibuwi.thewritingtreasurechest.com/uploads/1/3/1/1/131164250/830bc3d533e6.pdf
    • http://files.crewilliams.net/upl
    • https://cdn.shopify.com/s/files/1/0431/6089/5650/files/2626186715.pdf
    • https://cdn.shopify.com/s/files/1/0432/8272/7067/files/busidurerodig.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/76611012081.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/90664011034.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1048/files/suxuvuritofinujigimefo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/ram_body_builder.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/tutikekuvifigut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/20726054751.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/42945656234.pdf
    • https://cdn.shopify.com/s/files/1/0432/8207/1716/files/guzesebesa.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_off0000a212.bin
c20a7f1616ff4884d60e0d3809b398344e50a943da601a03d61704c6f0c707df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA212 5624 bytes
font_01_sfnt_off0000b501.bin
710679cff08d9c7165243edbe303e91031d593af42eb1f68a1f5f7a3f3c66979		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB501 10104 bytes

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