Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e855607995cf26…

MALICIOUS

PDF

40.4 KB Created: 2020-08-03 22:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8354ca8bb04a4ed731ad7b6c902895f1 SHA-1: 49d491a345e09a3c84d5114757f10505bde725c5 SHA-256: 94e855607995cf2671514b908797c98152627b6bacaac3c978e964f646761b5c
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=the+digestive+system+anatomy+pdf', suggesting a lure to a malicious site disguised as a document about anatomy. The presence of a malicious redirector link indicates an attempt to lead the user to a compromised or malicious resource.

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.com/pify?keyword=the+digestive+system+anatomy+pdf
    • http://files.aloewood.com/uploads/1/3/1/0/131069887/2348876.pdf
    • http://mojilof.shantellstricklanddavis.com/uploads/1/3/1/1/131164100/d3cae.pdf
    • http://files.khulaoncloud.com/uploads/1/3/0/9/130969448/sutubexijiri.pdf
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/ilco_key_blank_cross_reference.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1386/files/the_princess_bride_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/96371835707.pdf
    • https://cdn.shopify.com/s/files/1/0435/3084/6363/files/python_unit_test.pdf
    • https://cdn.shopify.com/s/files/1/0436/9770/1032/files/26999733812.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdf
    • https://cdn.shopify.com/s/files/1/0437/0379/5865/files/ge_electric_stoves_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3326/3253/files/89487748081.pdf
    • https://cdn.shopify.com/s/files/1/0429/7293/8399/files/44392120658.pdf
    • https://cdn.shopify.com/s/files/1/0441/1051/2280/files/ets_gre_verbal_reasoning_practice_questions.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/55606694970.pdf
    • https://cdn.shopify.com/s/files/1/0431/5083/5876/files/42741290405.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_off00006041.bin
1ec8a7c18b7c75c657f740a9b212d0bd5b0b1860825a9c321a1d2b72de1c211c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6041 5440 bytes
font_01_sfnt_off000072af.bin
76b6a9bc2a3cd05f1db098bbe9e8b80ee938af271f9933bae4de4844ee97a82e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72AF 9964 bytes

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