Malicious PDF — malware analysis report

Static analysis result for SHA-256 43dd41990b863970…

MALICIOUS

PDF

39.7 KB Created: 2020-09-01 05:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63faf8b9a5d9a4e5fb67a46c9254199b SHA-1: 67ffefb0119ae3b0a68ac8137ffa8c69e0ed7299 SHA-256: 43dd41990b863970e21c4c03aed89ff2c952b45acc9a5b2a574ecc7b2e86cc4f
120 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 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous links, many of which point to benign Shopify domains, likely as a camouflage or SEO manipulation tactic. The primary malicious IOC is the redirector URL.

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=chalk+line+outline+font+free
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/verbal_bullying_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0432/2272/8866/files/legojebuziboketenimo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/14491320868.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/rurafalixovalup.pdf
    • https://cdn.shopify.com/s/files/1/0436/0421/3917/files/bytes_to_mb.pdf
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/vokujuvetuzosotagup.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/bengali_calendar_1423.pdf
    • https://cdn.shopify.com/s/files/1/0440/2606/9157/files/43687230761.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/3268756397.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1566/files/baciloscopia_definicion.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_off00004d87.bin
52c176d4aca57f81c803d10df4b643a84d81bee40f396821c3dc5a0916ff4b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D87 4644 bytes
font_01_sfnt_off00005d45.bin
fad678dee7bb828f0ad6c0aa63b1ff388aed5fe4fb0d3d5133c157f9c6e32f24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D45 16688 bytes

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