Malicious PDF — malware analysis report

Static analysis result for SHA-256 861e979876062fed…

MALICIOUS

PDF

39.0 KB Created: 2020-08-08 01:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0700cdd5d9d83fbe3d2aa195e1f56559 SHA-1: 9d0806b157d1cfcafdcbcce426477ad2d36a1f78 SHA-256: 861e979876062fedc83f7efd2dda5dbbe70381ed89583e5cc64563f2038da05a
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to PDF files hosted on various domains. One of these links, 'https://ttraff.ru/pify?keyword=bach+fugue+bwv+1000+guitar+pdf', is identified as a malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to lure users to malicious infrastructure, likely for further exploitation or malware delivery.

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=bach+fugue+bwv+1000+guitar+pdf
    • http://files.mintkids.online/uploads/1/3/1/3/131384359/9792562.pdf
    • http://files.kyleyatesphoto.com/uploads/1/3/2/6/132681901/zubunage-fugejazawosuk-bofezo-nosakuzubadofam.pdf
    • http://files.jwpcc.org/uploads/1/3/2/6/132680808/5201679.pdf
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/xikazewuninipijegevan.pdf
    • https://cdn.shopify.com/s/files/1/0439/0741/6219/files/hyperbole_and_a_half_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/advanced_calculus_fitzpatrick.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6837/files/woxofowewuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/0911/3240/files/fadupelokowezuza.pdf
    • https://cdn.shopify.com/s/files/1/0446/9604/3674/files/the_transnational_capitalist_class.pdf
    • https://cdn.shopify.com/s/files/1/0432/0801/6027/files/jutotatiwisimekanufiziwap.pdf
    • https://cdn.shopify.com/s/files/1/0435/7485/3793/files/lilufir.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/sprinter_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/ssh_config_file.pdf
    • https://cdn.shopify.com/s/files/1/0439/0453/2648/files/momilusewaduvu.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_off0000580d.bin
f0259684428e10f52bb4505841a1dadeae5ae441324c8214d6047977e6d8249c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x580D 5740 bytes
font_01_sfnt_off00006bb1.bin
f37e1087950ff262d25a7be25699e19ddd77dc2e34b98d05f61ef21bd0448bc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB1 10444 bytes

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