Malicious PDF — malware analysis report

Static analysis result for SHA-256 2274d26f48970f83…

MALICIOUS

PDF

48.1 KB Created: 2020-07-30 23:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49eef9e5683f4112eb815ac25a254862 SHA-1: 870ad26047b1ea61658fa3c976244875fcbc6c5d SHA-256: 2274d26f48970f83f371a9d72a18d5f0e21b9342f5c5981a51c802e58a06567c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits malicious behavior through a link farm, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. It embeds numerous external links, with the primary malicious redirector being ttraff.ru. The document body contains garbled text, suggesting it's not intended for direct user consumption but rather to host these links.

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=kista+ateroma+pdf
    • http://files.cybersecurityinc.net/uploads/1/3/2/6/132681938/natuwafegaga.pdf
    • http://files.usslitchfieldcounty.com/uploads/1/3/2/6/132682790/senutipepu.pdf
    • http://files.educatorsforsocialjustice.org/uploads/1/3/1/6/131606890/kifiwip.pdf
    • http://files.educatorsforsocialjustice.org/uploads/1/3/1/6/131606890/kif
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/49772070617.pdf
    • https://cdn.shopify.com/s/files/1/0437/2204/7638/files/bubosizotineso.pdf
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/fisesuregopivapibe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1090/6518/files/64012141591.pdf
    • https://cdn.shopify.com/s/files/1/0436/4258/5241/files/3274380724.pdf
    • https://cdn.shopify.com/s/files/1/0429/2716/1507/files/sejogusupevixon.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/44764306472.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8505/files/71164147961.pdf
    • https://cdn.shopify.com/s/files/1/0432/6434/4219/files/sibufesegov.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/xerujidifejenem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.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_off00008075.bin
274919ff09399efabaf68ab691a848941eea94d5d826d3cc6dcf4b31677d7dc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8075 4808 bytes
font_01_sfnt_off000090cb.bin
de16257369491cda3d0e8377946767f28036899f354e64eee073c41e64307090		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90CB 10036 bytes

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