Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb07a92c7e9b485b…

MALICIOUS

PDF

41.4 KB Created: 2020-08-13 11:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b62ebc0de91f4c183c296cbb9737701f SHA-1: 78f0de734e028f0db27a5c5b4a7d8143dc86b730 SHA-256: bb07a92c7e9b485b03039d7f179074d55bd6ddbceb7866de0abdb763c7ab6010
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wb?keyword=presentation%20about%20education%20pdf', suggesting a lure to a malicious site disguised as an educational presentation. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm strategy to distribute 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.cc/wb?keyword=presentation%20about%20education%20pdf
    • http://files.vmclegalservices.com/uploads/1/3/0/7/130776817/gutolinelefamebijux.pdf
    • http://files.oneswaggent.com/uploads/1/3/0/7/130775868/noxajolepaguweju.pdf
    • http://files.mfundishijhutyms.com/uploads/1/3/2/3/132303382/xakituwukunaga.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/dugoju.pdf
    • https://cdn.shopify.com/s/files/1/0431/4166/0826/files/rasewisixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0323/9840/files/antiacidos_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/xinadojubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fusuzirosaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/vakovetumegegolabosu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/xozivigiredixisug.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/zuzezewoxexobifesefeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/celebrity_cruises_excursions.pdf
    • https://cdn.shopify.com/s/files/1/0430/8818/3456/files/zajotilemekurel.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_off00006758.bin
9866ed0842d3f348f30d2c663d6e6f7997301f401c78f6e323ba4e54226824f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6758 5260 bytes
font_01_sfnt_off00007933.bin
2a58001607d5b67793c2f2c30d7d39f8bfa0f1b5ec301da0124aeed285d88cda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7933 9232 bytes

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