Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb519fd0e59e8bfa…

MALICIOUS

PDF

36.3 KB Created: 2020-08-21 14:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d4e1f7f869829c0ece594b06ab6465c SHA-1: e505416625bd4eda63c078aa06d9ab5724c2ca66 SHA-256: cb519fd0e59e8bfaf8943b47000ca09cb1d707c56f20f09f404e378623ae7096
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is also present in the document body. This suggests the document is designed to redirect users to malicious content under the guise of providing educational answers.

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=geog.+1+4th+edition+answers+online
    • http://files.wildaboutwampum.com/uploads/1/3/1/8/131871721/diwurak-zajegapoxobile-juzewovupe-wuwenutawilotal.pdf
    • http://files.shirleypeppersart.com/uploads/1/3/1/6/131637218/teruxinareguku.pdf
    • http://bizule.lindaswannpaintings.com/uploads/1/3/1/3/131383664/7f089b360c874.pdf
    • http://tasebok.inciteeducation.com/uploads/1/3/0/9/130969204/7171236.pdf
    • http://files.berkeleywellbeing.com/uploads/1/3/1/3/131398452/1169348228b3.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/65398080054.pdf
    • https://cdn.shopify.com/s/files/1/0465/0110/1720/files/kewupetomadipixerin.pdf
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/benefits_of_avocado_leaves.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/zolenag.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/combining_on_mac.pdf
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/jefejaxivalelum.pdf
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/wivexijamowenefoz.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_off00004e15.bin
7ab79a2244d39a370bbeb7140a34f576a568c7baecea94d7aed68d4b4c9a4f22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E15 5380 bytes
font_01_sfnt_off0000607a.bin
64c8c90c7faab93ef685075387e2a44c4548e16168cdc88d78427cc79f83f7d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607A 10676 bytes

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