Malicious PDF — malware analysis report

Static analysis result for SHA-256 6298f2bdcfc6f22f…

MALICIOUS

PDF

44.4 KB Created: 2020-08-14 21:05:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1f3d175bf0ae073f35d30e3cfc4504c SHA-1: 9b6bc2daef08069ecdae516c31cff77a059a9032 SHA-256: 6298f2bdcfc6f22f7adad31d2472ab32c4620116ddc1fc9c8b644e6ca7c02323
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into clicking it. The ML classifier strongly indicates maliciousness, and the presence of embedded links aligns with a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/wb?keyword=libros%20de%20guion%20cinematografico%20pdf
    • http://files.cruiseandtravel.eu/uploads/1/3/1/8/131858045/3ef87dd1a51.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/1312/7844/files/84883524010.pdf
    • https://cdn.shopify.com/s/files/1/0439/4231/4152/files/pasta_recipes_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3700/7778/files/panufimifajefuvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8914/9608/files/xodipi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2067/2409/files/abstract_example_lab_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/2960/1175/files/numpy_moving_average.pdf
    • https://cdn.shopify.com/s/files/1/0435/2468/5976/files/washington_manual_of_surgery.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/mufuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9112/4643/files/gowus.pdf
    • https://cdn.shopify.com/s/files/1/0436/4782/8133/files/50889216521.pdf
    • https://cdn.shopify.com/s/files/1/0429/1883/8435/files/2782905928.pdf
    • https://cdn.shopify.com/s/files/1/0436/6240/9881/files/jasedesamigileseziputux.pdf
    • https://cdn.shopify.com/s/files/1/0438/9486/6088/files/guxunusaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1029/files/xawuterugufubidasup.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062f2.bin
433aa51016cd0a7197023c15a9d0c6aef1a09a5a757bf225b299288d15f8c24b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F2 5404 bytes
font_01_sfnt_off0000752e.bin
444a3dd92836f64abe4dc79c14a8f78d5c1458f43c5a84ea3ae9f733543f7445		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752E 9828 bytes
font_02_sfnt_off000096cb.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96CB 4324 bytes

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