Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f5d20c2d7bcd59…

MALICIOUS

PDF

46.2 KB Created: 2020-07-29 17:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 959361f6574daa6742f457a9e3b072da SHA-1: 2439670133742abd2328d85827ec72d671016bed SHA-256: b2f5d20c2d7bcd59ff77f46a2501218115fe209e645850eaa6eae9271234e4b9
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=jurnal+biosistematika+hewan+pdf', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs for SEO-based link farms.

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=jurnal+biosistematika+hewan+pdf
    • http://files.medhanialemla.com/uploads/1/3/1/4/131452944/2089856.pdf
    • http://files.broadchalkeparishcouncil.com/uploads/1/3/2/6/132683000/gefujudewigef.pdf
    • http://files.elliscountyequine.org/uploads/1/3/1/3/131378950/9950acd27.pdf
    • http://files.swellconnections.com/uploads/1/3/2/7/132710565/5788327.pdf
    • https://cdn.shopify.com/s/files/1/0431/0515/7282/files/61426108563.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1770/files/52817447339.pdf
    • https://cdn.shopify.com/s/files/1/0432/3888/3485/files/kotuvasagebabuwa.pdf
    • https://cdn.shopify.com/s/files/1/0435/7016/7966/files/82236360123.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6165/files/74355170056.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32505595602.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/mixefanotorobakalel.pdf
    • https://cdn.shopify.com/s/files/1/0432/2433/4498/files/vemefikepupu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/fofarigegeketamoriv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0429/3269/9302/files/gufujexewogiwud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/zodexodixozumifebas.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_off00007493.bin
be9a5f0d8504730d77a4d5c6f1fc2e0e364f1ccb9a8342db73e9c683006e052f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7493 5448 bytes
font_01_sfnt_off000086f4.bin
781c47e6a7dd6d698cd0af78cecdd9a90fde367ac40d3e5fe6b26cc49b1b6a6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86F4 10784 bytes

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