Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ebb63722f40587…

MALICIOUS

PDF

55.4 KB Created: 2020-08-23 06:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ada33c8555dedb7018aae7a9ce51063d SHA-1: 6f5a246596a07f1e7952fcbad325a3773010888a SHA-256: e6ebb63722f4058709fbf888aa734d1180ed23183c8be05846894a1d9aaf3420
150 Risk Score

Malware Insights

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

The PDF document is disguised as a manual for a Behringer mixer, but contains a critical heuristic firing for a malicious redirector link. This link, 'https://ttraff.ru/pify?keyword=behringer+xenyx+2442fx+manual+pdf', is designed to lead users to malicious infrastructure. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to PDF files, suggesting a broader SEO poisoning or spamming campaign. No scripts were extracted from this sample.

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=behringer+xenyx+2442fx+manual+pdf
    • http://files.spiritpathstudio.com/uploads/1/3/1/4/131406068/7691905.pdf
    • http://files.y4kc.org/uploads/1/3/2/6/132681891/mufenezilefat_wiwalajedolo_tedefesejukidif.pdf
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/81192441493.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.pdf
    • https://cdn.shopify.com/s/files/1/0429/9292/6883/files/40335911220.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/46080818435.pdf
    • https://cdn.shopify.com/s/files/1/0429/7913/1551/files/84979933565.pdf
    • https://cdn.shopify.com/s/files/1/0452/4562/8578/files/39068086951.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3408/files/bullet_bike_sound_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/6376/9243/files/report_counterfeit_cigarettes_uk.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/25473439989.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_off00009967.bin
7331d3d021f9ae66a716cd921b602a01a531f6326ee4722fcc4941df212ff865		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9967 5716 bytes
font_01_sfnt_off0000acc2.bin
f9505bb2e8bf172388bc1f904ef333c4b3a023c40ae5452a56dbf0e380fca364		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACC2 10588 bytes

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