Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a432b2c45cf1c3…

MALICIOUS

PDF

51.5 KB Created: 2020-08-14 21:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 022ed15d956f53d9f21059cb1c4e3f1a SHA-1: e817c56f576e88901baa6e6ac4a9b102c7d8a41a SHA-256: 24a432b2c45cf1c324ca39c423ec8417c75c8fadaf43e0b93c79105c5d65b0c3
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru', which is associated with malicious activity. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous external links, with the primary lure being related to 'Canada election party platforms'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and several other Shopify-hosted PDF links, suggesting a delivery mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=canada+election+party+platforms
    • http://files.jmagalskiphotography.org/uploads/1/3/2/8/132815979/5138931.pdf
    • http://files.allisondfredette.com/uploads/1/3/2/7/132740533/netilaxerares.pdf
    • https://cdn.shopify.com/s/files/1/0434/0665/5642/files/wuwefaneki.pdf
    • https://cdn.shopify.com/s/files/1/0432/1263/6315/files/98325704142.pdf
    • https://cdn.shopify.com/s/files/1/0445/7873/4239/files/28648405432.pdf
    • https://cdn.shopify.com/s/files/1/0433/7673/8462/files/duvezujudefivoratelivotof.pdf
    • https://cdn.shopify.com/s/files/1/0435/6443/3566/files/66303074948.pdf
    • https://cdn.shopify.com/s/files/1/0438/3683/3954/files/automate_the_boring_stuff_with_python_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/xaludazifokavipeke.pdf
    • https://cdn.shopify.com/s/files/1/0440/2518/4421/files/lagutidirirejegixafopogo.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_off00008bf4.bin
6ba52aea067a0458658c91ab4e5957b270c6a8a87e489a5f8b6a76c4a31bcfe4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF4 5308 bytes
font_01_sfnt_off00009df2.bin
8282d4cec09a501d61a7b2ddd7e66d5a0931c12d99dc6e816c6766e51ccea1a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF2 10444 bytes

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