Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b58f4360e6d96a3…

MALICIOUS

PDF

40.8 KB Created: 2020-08-06 20:44:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d0aff3c46685de08cbc76bf69d3caa0 SHA-1: 1e824a5609c3a2c6e6679e595ef9fb6b29e875fc SHA-256: 1b58f4360e6d96a367d6399cef6930672f5d37ee9e7feaa0e32b8f1142b79a82
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=centrales+electricas+en+argentina+pdf, which is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to this URL and other PDF links, suggesting a lure to download or view 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.ru/pify?keyword=centrales+electricas+en+argentina+pdf
    • http://files.coryskurdal.com/uploads/1/3/2/7/132712508/abf383def.pdf
    • http://files.linencanvaspaper.com/uploads/1/3/0/7/130739234/sigafofukireziv-zilaxo-zogavokugadejir-jokaso.pdf
    • http://files.determinedtolearn.net/uploads/1/3/0/7/130738622/d0ec0ccd5dc9ff.pdf
    • http://files.eastkentclassicmotorcycleclub.co.uk/uploads/1/3/2/6/132681342/2212548.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/89442842835.pdf
    • https://cdn.shopify.com/s/files/1/0435/4349/4807/files/deploy_personal_website_on_heroku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17673355306.pdf
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/5389971631.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/fijodeririboba.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/linked_list_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0434/2248/2582/files/sijaxuko.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/netuxujukinofedizekonid.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/safiled.pdf
    • https://cdn.shopify.com/s/files/1/0439/8183/2350/files/79044293697.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/vagelirezofoz.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_off00005d3d.bin
93234041cc41b300506cf03c1b27aa892d08f8de69ff86e79b8e593805bab967		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3D 5228 bytes
font_01_sfnt_off00006f11.bin
009edbb270560a87547a593a46599c7ebebb16db3b45c7685cdd10e08c7e6adb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F11 11440 bytes

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