Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a92466130f0288d…

MALICIOUS

PDF

45.1 KB Created: 2020-08-30 20:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0538cbf2caeabcd9726de5389eb7c240 SHA-1: dcfbe71cf9324dca9ff58c1acacbc2f56b2f3f19 SHA-256: 3a92466130f0288d326823a150a74cdcbfcb388acdd096fb5059126416e82b08
150 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/wix?keyword=snuff+chuck+palahniuk'. The document also contains a large number of links to PDFs hosted on Shopify, suggesting a potential SEO manipulation or content distribution scheme. The ML classifier 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/wix?keyword=snuff+chuck+palahniuk
    • https://cdn.shopify.com/s/files/1/0431/1613/4551/files/gixajorawoluximopokajuwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/school_application_form_template.pdf
    • https://cdn.shopify.com/s/files/1/0431/2124/6359/files/caerleon_comprehensive_school_ofsted_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/5113/8715/files/93584802704.pdf
    • https://cdn.shopify.com/s/files/1/0437/3823/5031/files/midel.pdf
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/troy_bilt_tb475ss_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/anatomy_of_liver_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/can_opening_a_be_dangerous.pdf
    • https://cdn.shopify.com/s/files/1/0429/1336/6182/files/79227585246.pdf
    • https://static.usrfiles.com/ugd/9e53d4_110a01851a2a4718be56078855bc04b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0936679e5e8f45da934086d05a081a7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b880260303124c3ebfbdd386b1fb8ee4.pdf
    • https://static.usrfiles.com/ugd/e4a001_471de907b05c4a278ad6440ed7e263a3.pdf
    • https://static.usrfiles.com/ugd/60933b_7f6e115bd0bf4ecd95d52120ea59ab45.pdf
    • https://static.usrfiles.com/ugd/2f07a1_6b9f62409d3f4c56a107a464357dfd3e.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_off0000743c.bin
cc842546581bd7c4bcbfe55e3c8154edd9b8f65aaa6a8889f30c99c756d02911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743C 4996 bytes
font_01_sfnt_off0000853a.bin
2f1f8eaab7ed0231ab3272780a69d7592887cc4b1d6b023efa0c2fc434bbfef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x853A 10204 bytes

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