Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9cba76f399f66c…

MALICIOUS

PDF

32.7 KB Created: 2020-10-04 20:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 4b920c7c679f7b16fdfce9301dd8c8b0 SHA-1: d0be33989c4c285446fbd0fc277c814412a277d1 SHA-256: 3d9cba76f399f66c305e1f778be073b928e41ad372f4729ab96687245c688e4e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://gettraff.ru/strik?keyword=mortal+kombat+rebirth+torrent', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?keyword=mortal+kombat+rebirth+torrent In PDF document text
    • http://files.shawaboutart.com/uploads/1/3/1/3/131379971/bofilovaf_wulirid_punofe_dafevarudo.pdfIn PDF document text
    • http://dufofe.signsbytran.com/uploads/1/3/1/0/131070356/125de5658.pdfIn PDF document text
    • http://files.roxaniart.com/uploads/1/3/2/7/132740665/butusiraz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6544/1445/files/will_hayden_verdict.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/siruxazipijuveru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/4323/0374/files/33893059886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3427/9062/files/36527240465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad597bb-8bf7-441e-b0e9-4704fd298902/lekenarini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/795e3d35-dd1f-4280-8c56-4b48d837cb26/vikufezeliju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f27a286b-ae8a-4490-8991-f63965c21360/janolo.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C0 4956 bytes
SHA-256: 2e8ceade93f031b275e877d14f3da530769116de1747d55b80790260643e8b87

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