Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac79dfbe3ae55099…

MALICIOUS

PDF

43.3 KB Created: 2020-08-01 09:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 030a6849c0a3fd9bbe90511cd2bc020a SHA-1: 2eb92eaf68743cc28bd4e14680c0d652a246f9b5 SHA-256: ac79dfbe3ae5509936e8c8c5feb4bde2dde0e32bc21a0484f516621b55b6f86f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=leverage+watch+online'. This indicates an attempt to redirect the user to a malicious site. The document body also contains this URL and numerous other links, many hosted on Shopify, suggesting a link farm or content distribution network used for hosting malicious files. The ML classifier also strongly flagged this PDF as malicious.

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=leverage+watch+online
    • http://files.traininggroundpublications.com/uploads/1/3/0/7/130739971/kasijolo-vepubolije-tosevip.pdf
    • http://files.jharidingacademy.com/uploads/1/3/1/0/131071252/vovujebanabab_gonafewutukuro.pdf
    • http://files.foxhollowridingacademy.com/uploads/1/3/0/9/130969527/7381262.pdf
    • https://cdn.shopify.com/s/files/1/0433/2870/0571/files/94173546242.pdf
    • https://cdn.shopify.com/s/files/1/0432/5687/3128/files/nejemuditekarobowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/rodixedebujotaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/kizeledapezuzurewano.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/sebaluwamavewewitogoju.pdf
    • https://cdn.shopify.com/s/files/1/0428/8564/4447/files/72763381347.pdf
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/82758027876.pdf
    • https://cdn.shopify.com/s/files/1/0430/4551/9513/files/1638349595.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0471/files/golidodifenop.pdf
    • https://cdn.shopify.com/s/files/1/0428/8898/6787/files/47175904174.pdf
    • https://cdn.shopify.com/s/files/1/0428/0988/4838/files/tugugojugotejupufinumomim.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052e0.bin
23604d54ea2939aea8c1cbe12e86b8b48d3ab9b955dc6fe7d4206251a3d458a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52E0 3836 bytes
font_01_sfnt_off0000609c.bin
c98fd4332bf9570373ecda1dcc2c92605159685d2ce5b0c277bcf26e3c036d8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609C 4976 bytes
font_02_sfnt_off000071a4.bin
eeacef07495826841421777577b5b7f1c80a5a328ee79b46442b0aa9ccd9425a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A4 15348 bytes

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