Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84498b80d193d2c…

MALICIOUS

PDF

43.5 KB Created: 2020-11-07 06:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e4e177ef35e17379f57db55eef09962 SHA-1: ccc5d66dcb9d0abce3691081f9685e228df9665a SHA-256: f84498b80d193d2c8b16843d01266258d2680a46d60341ebdf15c56fa095d942
94 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm and embeds external URIs, suggesting a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of numerous external links, including one to 'trafffi.ru', points towards a phishing or SEO manipulation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 3

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=sd+card+manager+app+android
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdf
    • https://rugeponejap.weebly.com/uploads/1/3/4/4/134487210/4164638.pdf
    • https://damokilusul.weebly.com/uploads/1/3/4/4/134463963/1903809.pdf
    • https://lizotolagodega.weebly.com/uploads/1/3/4/4/134495854/zogaxanej.pdf
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/nutokekelomalek.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b417e75c-93b9-40d5-bf71-c3dddcbb304a/gafixo.pdf
    • https://uploads.strikinglycdn.com/files/60a87f74-0338-4bea-8585-30a6a28fb32c/list_of_specialist_species.pdf
    • https://uploads.strikinglycdn.com/files/a549d5f6-d323-456e-bb61-2ba1c041fac7/94371615828.pdf
    • https://suvarofora.files.wordpress.com/2020/11/lodebukiworidu.pdf
    • https://uploads.strikinglycdn.com/files/c98028e8-d618-43d6-a31c-95efc2a20269/6833122450.pdf
    • https://uploads.strikinglycdn.com/files/6e6bcc84-5941-4d36-8dff-097a226b28b0/zojukufowibemuxexene.pdf
    • https://mutozofe.files.wordpress.com/2020/11/65548376527.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bd8.bin
a367c5d0e2ddd4b7c8a2fd44f8a479103f9fd8aa99f77c28dafd0846ad719a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD8 5284 bytes
font_01_sfnt_off00007dc0.bin
49596c8a81bf1899adeb6bf791fed7b56ddc737e06f1605acb29907f220b7a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC0 18180 bytes

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