Malicious PDF — malware analysis report

Static analysis result for SHA-256 36a1cccb0c731d91…

MALICIOUS

PDF

62.4 KB Created: 2020-07-31 06:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 562d619468e3baacc9436f50f90e7f7f SHA-1: 43e4754bc4f51009b43cc832ff86182083ed921c SHA-256: 36a1cccb0c731d915e8ce004a221e2f0fa46b7e34b1c4b97cfaa122fe5c2eaca
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm or SEO manipulation tactic, with numerous embedded URLs. One of these URLs, 'https://ttraff.ru/pify?keyword=anna+achmatova+requiem+pdf', is identified as a malicious redirector. The presence of many Shopify-hosted PDF links suggests an attempt to artificially inflate search engine rankings or distribute content through a seemingly benign platform, while the malicious redirector indicates a potential for further malicious activity.

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=anna+achmatova+requiem+pdf
    • http://files.napervillebedbugs.com/uploads/1/3/1/6/131637546/090584493f844.pdf
    • http://files.couragetogrowfarms.com/uploads/1/3/2/6/132681464/237898.pdf
    • http://files.cellar27furnitureco.com/uploads/1/3/0/7/130776033/2490977.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fexofedome.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/75014301063.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/najabimelegelokawuxedajot.pdf
    • https://cdn.shopify.com/s/files/1/0437/3600/6817/files/jesugasatukowav.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/92020925683.pdf
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/libisotavat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/805830081.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4888/files/73097210065.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/97291966754.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/
    • https://cdn.shopify.com/s/files/1/0427/6974/402

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8e6.bin
286fa4da972508e12e276175716ac698b3f77b17a882acdb4c6c4afd7e791a63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8E6 5240 bytes
font_01_sfnt_off0000ca87.bin
cbd788b470661838fd6fb5ca131bc0b6087a6eb179924327b214898d4bbf329f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA87 9952 bytes

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