Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e7386f99e1798c6…

MALICIOUS

PDF

39.5 KB Created: 2020-08-30 05:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e7ad43a6b74c326660f2226f79af321 SHA-1: 99f9266e1ec89ef6fd95997697c93ae6a8ee8625 SHA-256: 4e7386f99e1798c6f1c26787c461b57de2da86b60de139337e81a53c00c3e9e3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with the primary malicious URL being https://ttraff.ru/wix?keyword=arist%25C3%25B3teles+filosofia+pdf. This URL is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to "Aristoteles filosofia pdf" and the authoring application "wkhtmltopdf", suggesting a lure to disguise the malicious intent. The presence of numerous Shopify-hosted PDF links indicates a link farm strategy to potentially improve search engine ranking for the malicious 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.ru/wix?keyword=arist%25C3%25B3teles+filosofia+pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/lalatulobazalixofopun.pdf
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/98178528153.pdf
    • https://cdn.shopify.com/s/files/1/0463/2500/6497/files/83367961076.pdf
    • https://cdn.shopify.com/s/files/1/0432/4648/5672/files/gevegidaledo.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab7c7bcb4dd4420a91584ebe5a9a0103.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d9a077fd06d433392c193ee7a9845e5.pdf
    • https://cdn.shopify.com/s/files/1/0436/5503/7078/files/online_retail_business_plan_sample.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/bexanexixirimenetabato.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/pirazejijowik.pdf
    • https://cdn.shopify.com/s/files/1/0429/6245/2643/files/robosomubofujigajigerek.pdf
    • https://cdn.shopify.com/s/files/1/0459/9054/3519/files/levunexajukepilo.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_off00005adc.bin
031c14a3278bf7bff730cbc065f2bfd446527ae5f67f6c97769d04263e39e864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADC 5160 bytes
font_01_sfnt_off00006c33.bin
722e52782ccf86f8c59996e784005f28502ccb8721a28fddcdbb75067f59b7ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C33 11104 bytes

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