Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e6a5eb700b0b4f…

MALICIOUS

PDF

43.7 KB Created: 2020-08-08 11:12:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ad43f2e30abd38be60cba59940ac2d0 SHA-1: 40a66b16539f8e11952a8c5a02d4566577454e8c SHA-256: 99e6a5eb700b0b4f82d6167b1ee22bdba17e471505fe9e3c8a58535ac29a9c03
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One of these links, 'https://ttraff.ru/pify?keyword=tout+sur+l+anatomie+humaine+pdf', is identified as a malicious redirector. The document's content, though partially corrupted, appears to be a lure related to human anatomy, likely intended to disguise the malicious nature of the embedded links. The presence of a mass external PDF link farm further supports the malicious intent.

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=tout+sur+l+anatomie+humaine+pdf
    • http://files.ravenswoodfitness.com/uploads/1/3/1/4/131438216/90fbbf1eac0ac7.pdf
    • http://files.heroesofcolor.com/uploads/1/3/0/7/130776164/ripupa.pdf
    • http://files.acupuncture4yourhealth.com/uploads/1/3/2/8/132814343/6809803.pdf
    • http://files.hamdasti.com/uploads/1/3/1/4/131453432/voxagezinupado.pdf
    • https://cdn.shopify.com/s/files/1/0430/5934/7618/files/wenotapujunukezewav.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/chiaki_fan_club.pdf
    • https://cdn.shopify.com/s/files/1/0430/6957/1233/files/58313841847.pdf
    • https://cdn.shopify.com/s/files/1/0438/8962/3208/files/xinerabowesixit.pdf
    • https://cdn.shopify.com/s/files/1/0435/4031/6319/files/13224629805.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/jelimutifezep.pdf
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/29173743416.pdf
    • https://cdn.shopify.com/s/files/1/0430/0455/9519/files/calcium_oxalate_kidney_stones.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/95119657631.pdf
    • https://cdn.shopify.com/s/files/1/0436/0513/1421/files/weedeater_carb_adjustment.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/88490257821.pdf
    • https://cdn.shopify.com/s/files/1/0438/2677/4173/files/ralolazim.pdf
    • https://cdn.shopify.com/s/files/1/0438/0760/4896/files/kipejos.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_off0000696a.bin
7c8d6c97a1b4837da67c559fd3437d7745ed1116a57b80178850edb5a4982e15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x696A 5228 bytes
font_01_sfnt_off00007b03.bin
a4213466b6cb7ed985b314ba4734fad2bb7bfb8fc186922ce9ab3a36327f73e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B03 11652 bytes

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