Malicious PDF — malware analysis report

Static analysis result for SHA-256 906e30966b37a3c1…

MALICIOUS

PDF

42.9 KB Created: 2020-08-21 01:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 026d1e6948d0306f231d6b8851bf8bb8 SHA-1: 41add12b274916d93e6c84fb471bfc120fa0b7ff SHA-256: 906e30966b37a3c12dbef2fff2aac324fc56901cf5b8a5dbf43d6b2679257b99
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.ru' which is associated with the keyword 'bkav pro android crack', suggesting a lure for users seeking cracked software. The document body, though heavily obfuscated, also contains this URL and references to security software. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

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=bkav+pro+android+crack
    • http://files.heavensgatepmc.com/uploads/1/3/2/7/132712323/a65af25336a2060.pdf
    • https://cdn.shopify.com/s/files/1/0434/4207/7852/files/attractive_man_conversation_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/0855/6182/files/nofovazunuzonomowuronep.pdf
    • https://cdn.shopify.com/s/files/1/0448/0273/6279/files/5701783684.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/suramagufumaxuragozud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/70528214470.pdf
    • https://cdn.shopify.com/s/files/1/0437/8427/4081/files/92646036971.pdf
    • https://cdn.shopify.com/s/files/1/0432/3993/2064/files/23363360392.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/33938541961.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_off00005d26.bin
ec3084ef676dbf34ab5e0c6d23a37d546f71d0fc1369399ee6670672f3024d60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D26 5028 bytes
font_01_sfnt_off00006e51.bin
a213c266da5bd10b9dfc1b2dc8a7135f529190c3f0f78d2cf300df62933e153b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E51 15796 bytes

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