Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64544aa64cac73d…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 11:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9f46ea2593cecd5cc4c8681faceaeee SHA-1: 7154118a1eb4e102454d92c79935cb095a0c1b75 SHA-256: b64544aa64cac73d4b8c616fb5098d8a2699ce1f1c6bf15095d5e5cd91c0deb5
150 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used to create link farms for SEO poisoning or to obscure malicious destinations. One of the embedded URLs, 'https://ttraff.ru/wix?keyword=sesin+maddeyle+etkile%25C5%259Fmesi', is flagged as a known malicious redirector. This suggests the document's primary purpose is to lure users to a malicious site, likely for phishing or malware distribution. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the direct user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=sesin+maddeyle+etkile%25C5%259Fmesi
    • https://static.usrfiles.com/ugd/eb5a6a_e474b8e481514ac391d65cf89718e17e.pdf
    • https://static.usrfiles.com/ugd/b8c837_04d1f3a3380e4712b1ef075d87b1ab9a.pdf
    • https://static.usrfiles.com/ugd/b8c837_085437aa8ead483f82bd694a5c504171.pdf
    • https://static.usrfiles.com/ugd/4f270c_63fbc8509143489387913247d042ddec.pdf
    • https://cdn.shopify.com/s/files/1/0437/1264/3223/files/agujero_negro_m87_informacion.pdf
    • https://cdn.shopify.com/s/files/1/0435/9002/5379/files/tikubipalowadetorup.pdf
    • https://cdn.shopify.com/s/files/1/0462/3083/1258/files/educational_website_templates_responsive.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/vewibarijetoseriwefedid.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4524/files/list_of_mnc_companies_in_tamilnadu.pdf
    • https://static.usrfiles.com/ugd/834936_f8a0f86ef68e4cab9e38d03b71fafc40.pdf
    • https://static.usrfiles.com/ugd/3d0627_fdb6dc94606944adbf01b20209b88ed9.pdf
    • https://static.usrfiles.com/ugd/b8c837_607fbfb1d5f645238b825f8f09e0339f.pdf
    • https://static.usrfiles.com/ugd/735424_0255f1a629b948149514288ca643af17.pdf
    • https://static.usrfiles.com/ugd/b8c837_30e52e76c26a4a27a458c873ae60bbbf.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_off00005e7d.bin
4b62e6f7fc0f937b39c274f3a0f5a18a8756292e41ee144150b508a51038292b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7D 5392 bytes
font_01_sfnt_off0000704c.bin
d590116f01656f477833a06fe39e83d4074dc757b705c4561851a76f624d9d20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704C 10848 bytes

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