Malicious PDF — malware analysis report

Static analysis result for SHA-256 371f99823dfaeb01…

MALICIOUS

PDF

41.5 KB Created: 2020-09-09 09:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2d4df830e32df43dfa3b007fa17928a SHA-1: fac05076538cb190f82fa2f7981b476b57cf086f SHA-256: 371f99823dfaeb01c880fd2a4e7511ee8bea61959de15362219148f255f17666
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.me'. This URL is presented within the document body, disguised as a 'google sheets calendar template free' download. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute the malicious URL. The ML classifier also strongly flagged this PDF as malicious.

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.me/wix?keyword=google+sheets+calendar+template+free
    • https://cdn.shopify.com/s/files/1/0461/9206/6710/files/pci_dss_breach_reporting_requirements.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9558/files/58647979695.pdf
    • https://cdn.shopify.com/s/files/1/0432/1860/0104/files/ny_dmv_registration_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/rojorobadazisemama.pdf
    • https://cdn.shopify.com/s/files/1/0439/7246/0702/files/blouse_neck_design_cutting_and_stitching.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/kejunekujanegigovukaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nulexukiwogefera.pdf
    • https://static.usrfiles.com/ugd/0a052f_4f73928901ae4424817b867a95bba503.pdf
    • https://static.usrfiles.com/ugd/b444d4_82bcc6e854294ca292e00ff6efaa9711.pdf
    • https://static.usrfiles.com/ugd/4c3d6a_27a754b62a934846a43f0e4505028ae6.pdf
    • https://static.usrfiles.com/ugd/fbcb80_d26ea48b8faf4405bcb9977b87c998c9.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_off00006360.bin
a17eaf53c4e04ac18b628a4d163153eebc7b7fe60900b843fbe92a4cd52123a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6360 5600 bytes
font_01_sfnt_off00007647.bin
7dbc12eaad768a7091ff7f642c6e806b74438613be11a13009d774fec96405ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7647 10440 bytes

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