Malicious PDF — malware analysis report

Static analysis result for SHA-256 363e223af047f834…

MALICIOUS

PDF

79.9 KB Created: 2020-08-31 07:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be61499988c70d9ab26df44fa4c5df78 SHA-1: b329f1cae96e2c7a23a73c9d246f37d6d767b2aa SHA-256: 363e223af047f8349ae92c428b0bb85c25f71009a2a7ca65d14d5791d2829d22
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.cc/wix?keyword=adaptaci%25C3%25B3n+de+la+escala+de+inteligencia+terman'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The PDF also contains a link farm heuristic, indicating a potential SEO poisoning or spamming tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.cc/wix?keyword=adaptaci%25C3%25B3n+de+la+escala+de+inteligencia+terman
    • https://static.usrfiles.com/ugd/76b6de_9d96d9837dce4889a7f93702598dd238.pdf
    • https://static.usrfiles.com/ugd/221f3a_8c057d922231482880fac83f29a39505.pdf
    • https://static.usrfiles.com/ugd/ae059d_036d3ba12acf4295a5851e820f177980.pdf
    • https://cdn.shopify.com/s/files/1/0433/7814/7491/files/bigewukonopo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2730/files/2827762639.pdf
    • https://static.usrfiles.com/ugd/b8c837_baa8a104365144aca3b6f00fa7886710.pdf
    • https://static.usrfiles.com/ugd/23e9be_aadeea2ee4f6428a867e9031f93fc9db.pdf
    • https://cdn.shopify.com/s/files/1/0437/7794/9848/files/bidart_campos_germn._compendio_de_derecho_constitucional.pdf
    • https://cdn.shopify.com/s/files/1/0439/4817/9611/files/rosugogide.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_off0000ee44.bin
67e39abfb2b077a1a8a7cf1f3b138d40766de6af22957416cd6bec2a588ebfa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE44 5520 bytes
font_01_sfnt_off000100a6.bin
589421ee3ef943eedfc11df23aa96b744d34c247ffe5ac7286a8956741d0463f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100A6 16000 bytes

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