Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8622987e77761ea…

MALICIOUS

PDF

38.1 KB Created: 2020-08-20 22:00:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58a81b082081529e02c03980c721ab64 SHA-1: 8e5bf6c82913ba2ee198b6149dc7cef840c202ec SHA-256: a8622987e77761ea1a154d164042901b4e858f6d3edbca44abab796898b17683
120 Risk Score

Malware Insights

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

The PDF file contains a link disguised as a manual for a Whirlpool electric oven, which redirects to a malicious URL. The PDF also contains a large number of embedded links, many pointing to Shopify, suggesting a link farm or SEO poisoning tactic. The primary malicious URL identified is ttraff.ru, which is flagged as a malicious 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=whirlpool+electric+oven+akz451+manual
    • http://files.niteknight.com/uploads/1/3/0/8/130813899/3958362.pdf
    • https://cdn.shopify.com/s/files/1/0429/4030/1478/files/mandalorian_knee_armor_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4070/files/89635135014.pdf
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/84944697613.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0648/files/tilaxik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/nowajob.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/jetazetewesivara.pdf
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/29638954169.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zosakasebiribo.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_off00005657.bin
4d9ef4234ecca18baed299f1e2d13601dc47db420c1d5db7599f7e0e4bd7ef34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5657 5444 bytes
font_01_sfnt_off000068d0.bin
5ad3b1d4a3e1637754a9cf646b99afabad5dc66f3ef599e2199a7078dbf4e99b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D0 10140 bytes

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