Malicious PDF — malware analysis report

Static analysis result for SHA-256 8301910e09d08ec7…

MALICIOUS

PDF

41.2 KB Created: 2020-08-19 19:24:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f01947bda77b129893bf5bcba6c80be SHA-1: 854828bdc0b4127d1831c4d957e242e04268d805 SHA-256: 8301910e09d08ec731f94208b86eec3776d44a3e01888d321ac85079ee5109fa
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector. The presence of a large number of external links, many pointing to Shopify, suggests a link farm intended to manipulate search engine results or distribute content. The primary malicious link is https://ttraff.ru/pify?keyword=kenexa+prove+it+excel+answers.

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=kenexa+prove+it+excel+answers
    • http://files.manitobarugbyhalloffame.com/uploads/1/3/1/1/131164281/6e2319b.pdf
    • https://cdn.shopify.com/s/files/1/0432/2669/3789/files/vaxosa.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/libro_aprender_portugues_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/boravujuxevepixosopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4170/2567/files/48172260850.pdf
    • https://cdn.shopify.com/s/files/1/0431/2793/1046/files/33294999802.pdf
    • https://cdn.shopify.com/s/files/1/0433/9548/1750/files/sosubidozokufatawisasom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9173/9295/files/calendario_lunare_semina_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jotinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1329/9620/files/2596259715.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/gozigasulozalol.pdf
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/tratamiento_nutricional_para_artritis_reumatoide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2906/files/dorivipuwozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/romiket.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_off000063f8.bin
cbf61b66075ef455692dc494f7a5b5e75cd8f24c6e7e6e0d2501bd4ae7e599fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F8 5116 bytes
font_01_sfnt_off00007584.bin
92105ab5e44a1e134e65f30159072f9dbc4465b770187e7dd25d816a8de9bc25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7584 10104 bytes

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