Malicious PDF — malware analysis report

Static analysis result for SHA-256 94eea82bc0e3987b…

MALICIOUS

PDF

53.3 KB Created: 2020-07-29 10:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57e560fc68696f598bf6d594639dc651 SHA-1: 158a7d1c8e6918c52b1a6c0e075ae5125af927f9 SHA-256: 94eea82bc0e3987ba0d783cb3cbf31618b93a71d08c23ea708ec91ce85c38685
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is presented to the user as 'interview questions on c language for freshers with answers pdf'. The file also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic. The primary malicious URL is the most critical IOC.

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=interview+questions+on+c+language+for+freshers+with+answers+pdf
    • http://files.corkscreworders.com/uploads/1/3/2/7/132712080/godunas.pdf
    • http://files.yasmeenalawadi.com/uploads/1/3/0/7/130738915/wixebaku-dekoxuleka-weluz.pdf
    • http://files.missourimidwivesassociation.com/uploads/1/3/2/6/132683014/fopasotuvipofamesode.pdf
    • http://files.ithacaymca.com/uploads/1/3/0/7/130775375/malugewa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xozujegemuzudileruzodedus.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/mepawexabusoxajokidum.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/zujuwejevufege.pdf
    • https://cdn.shopify.com/s/files/1/0438/4918/7493/files/98068512172.pdf
    • https://cdn.shopify.com/s/files/1/0428/3544/3875/files/girewezesipilegemeto.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/dulomizezikulixelekul.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/88233012692.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pitoparejiki.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/xatediwoditete.pdf
    • https://cdn.shopify.com/s/files/1/0436/5615/1190/files/23290271019.pdf
    • https://cdn.shopify.com/s/files/1/0434/0049/5260/files/57778531108.pdf
    • https://cdn.shopify.com/s/files/1/0432/4163/5997/files/zuduwumisaduxazixuzav.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/
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/zujuwejevufe

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008bbf.bin
e9b7f64de7c96d3152b1d45afc809bc2a4cdcb4c05fda9b7d317a7772814740d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBF 5516 bytes
font_01_sfnt_off00009e87.bin
c871747b614a77dcacf56b49c9a59bff69aadf548edecaccc633a2239af4e53f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E87 12584 bytes

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