Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21ef7b51c989729…

MALICIOUS

PDF

39.1 KB Created: 2020-08-31 22:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a9bdf00efef4c043f1496459c478a93 SHA-1: c847d4235d682902e3f5e40f18294b92988e5ae3 SHA-256: e21ef7b51c98972968ee6a11fb282ebcd369d801a893293550f1b93af4e2bb53
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, characteristic of a link farm. One of these links, 'https://ttraff.ru/wix?keyword=ikea+in+china+case+study+pdf', is identified as a known malicious redirector. The document body is heavily obfuscated and contains remnants of the URL, suggesting it was used as a lure. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination.

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/wix?keyword=ikea+in+china+case+study+pdf
    • https://static.usrfiles.com/ugd/b8c837_f17a7107139c4720a0155e6e97f25fed.pdf
    • https://static.usrfiles.com/ugd/fa6f14_36819f8329934cab8fa14e1e2cff10e6.pdf
    • https://static.usrfiles.com/ugd/2e79a6_1d4917d7e0b54c81b594b737616c17ba.pdf
    • https://static.usrfiles.com/ugd/469aea_4b78f6655d9c463c9b1548efed4cd5ac.pdf
    • https://static.usrfiles.com/ugd/05900a_e8abbab5304940c9b6b77522cdd3d1f9.pdf
    • https://cdn.shopify.com/s/files/1/0433/6756/3420/files/16887615554.pdf
    • https://cdn.shopify.com/s/files/1/0437/6766/0706/files/65009420921.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8985/files/wajazolelobem.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/fajanilanezuka.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_off00005d97.bin
e98ea8aa88cef225dc5662a490277add10294dcd7b285f16e925c08c9f7c58f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D97 5216 bytes
font_01_sfnt_off00006f65.bin
19de2992c311afc2ece19637fd239f934028e8e3ef3bba67e8376b3ebefd89ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F65 9648 bytes

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