Malicious PDF — malware analysis report

Static analysis result for SHA-256 501293bdcbbf26a3…

MALICIOUS

PDF

48.8 KB Created: 2020-08-17 10:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 460719afccf439488dcacee86fdc769b SHA-1: 1bcc5c45253f0b084b085e968996ec2a8b44c69e SHA-256: 501293bdcbbf26a3f8d12e4da149e0d634bfd7660b1efac17969d3c2a3512a27
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a search result for educational content. The document body, though heavily obfuscated, contains the same URL. The PDF also exhibits characteristics of a link farm, with numerous embedded links pointing to external resources, likely for SEO manipulation or to host further malicious content.

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=mcgraw+hill+education+sat+2017+answers
    • http://kovojexi.tessarushtonfit.com/uploads/1/3/0/7/130775350/743f3a781f409e.pdf
    • http://dazujam.adorablepotatocreations.com/uploads/1/3/1/0/131070993/wuveluse.pdf
    • http://files.hellotaiwan.us/uploads/1/3/1/1/131163782/fakoxumevaxebepeju.pdf
    • http://bexevaka.warriorschnauzers.com/uploads/1/3/0/8/130874493/bodanelexijejudije.pdf
    • http://kovojexi.tessarusht
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/kowikakov.pdf
    • https://cdn.shopify.com/s/files/1/0438/1815/6192/files/business_complaint_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9632/files/tigijefebi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3616/files/6931262135.pdf
    • https://cdn.shopify.com/s/files/1/0440/7492/6230/files/97130023865.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32296476761.pdf
    • https://cdn.shopify.com/s/files/1/0432/3393/5519/files/34065350739.pdf
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/defap.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_off000077f1.bin
ce441ec3d5bf93e5db4227864bbb2535907834502f8ee741eaf5cad6303e7956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F1 5704 bytes
font_01_sfnt_off00008b73.bin
13c7ff4fb7e38a1a13240116b4111ca4fa8beca25575de20dddb298d8c6de6ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B73 13396 bytes

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