Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee363b6961e9598…

MALICIOUS

PDF

36.4 KB Created: 2020-08-07 04:31:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ab744793b66aac2c1108818117206f8 SHA-1: 2aa3afbf90831c7c8e6299e1326722d01ff53d42 SHA-256: dee363b6961e9598edb89a4402fcd966e2d907bf950b90ec0f877dc0cb00618a
120 Risk Score

Malware Insights

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

The PDF file contains a link disguised as a math textbook guide, which redirects to a malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. The file also exhibits characteristics of a link farm, with numerous embedded links pointing to external PDFs, as indicated by PDF_SEO_LINK_FARM. The primary malicious URL identified is ttraff.ru, which is used as a redirector.

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=oxford+math+book+for+class+4+teacher+guide+pdf
    • http://files.vigocountycrimevictimassistance.com/uploads/1/3/0/9/130969184/6711886.pdf
    • http://puwipo.smilliestudio.com/uploads/1/3/0/8/130814328/sepafozulono-kadogawe-pefogozasigaroz.pdf
    • http://files.myoppconsulting.com/uploads/1/3/0/7/130775654/fefitit_donarinete.pdf
    • https://cdn.shopify.com/s/files/1/0434/2959/3245/files/vomilujivimivawiwuxiwefos.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdf
    • https://cdn.shopify.com/s/files/1/0434/2687/3509/files/dsp_addressing_modes.pdf
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/82140990575.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4629/files/name_letter_tracing_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/9658/8967/files/nomemos.pdf
    • https://cdn.shopify.com/s/files/1/0434/6668/6629/files/deviwifo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/tarodo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4996/5985/files/tulunekapuwurolunimugef.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2245/files/96278722178.pdf
    • https://cdn.shopify.com/s/files/1/0428/0804/9830/files/83344367325.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_off00004dd4.bin
f89acf0323f2152c81d91eb25e3f536b7c3e3c2a533cd5e04aea6e42318cfbec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD4 5956 bytes
font_01_sfnt_off000061f4.bin
3f49067a9959ea14ca33b15b5eeeca856a139011545f874f3e6d95060ed164a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F4 10244 bytes

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