Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a43113d01c3fc53…

MALICIOUS

PDF

44.6 KB Created: 2020-08-12 20:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b842a38fc7f4b651853afd039686033 SHA-1: 7ffd7ef67298f6082211b9ef38e56eb2de06e177 SHA-256: 9a43113d01c3fc536ba80602b6196c8724701fb4ba9dcf41ef7b64a3703cdb46
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the text 'Calisthenics workout routines full body transformation guide pdf' and the malicious redirector URL, indicating a lure to entice users to click through to potentially harmful content.

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.cc/pify?keyword=calisthenics+workout+routines+full+body+transformation+guide+pdf
    • http://files.pcbaseballacademy.com/uploads/1/3/1/3/131381614/7a04eb1f.pdf
    • http://files.alternativeroads.com/uploads/1/3/2/8/132814448/1086129.pdf
    • http://befewume.azzarodogs.com/uploads/1/3/1/6/131606490/4584293.pdf
    • https://cdn.shopify.com/s/files/1/0452/5824/4257/files/vilexela.pdf
    • https://cdn.shopify.com/s/files/1/0440/5100/5590/files/putikokalofaxavuxiwirabap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93236297381.pdf
    • https://cdn.shopify.com/s/files/1/0432/0323/1908/files/91591563508.pdf
    • https://cdn.shopify.com/s/files/1/0445/4485/2127/files/moz_beginners_guide_to_seo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6787/5228/files/misivikorupot.pdf
    • https://cdn.shopify.com/s/files/1/0434/1379/9066/files/nuvezubupu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1559/files/vamabepubagim.pdf
    • https://cdn.shopify.com/s/files/1/0438/8939/3816/files/xewepimirosonuleraxokofak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mujunevuduw.pdf
    • https://cdn.shopify.com/s/files/1/0455/7848/5925/files/treatment_of_iron_deficiency_anemia.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_off00006df2.bin
94bb5ba7df258a6a1f14068f0ea189301ad0fd8aef40faf8bdffd8bee063af5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF2 5872 bytes
font_01_sfnt_off000081d2.bin
2d982d54a0feeef8cd2ad41fc579f6491d03f5d320011ad87e4f2e369dac42fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D2 10300 bytes

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