Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7a02138570c244…

MALICIOUS

PDF

46.8 KB Created: 2020-08-18 23:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6b1edbb719ccfbc4d667852f3c81dd3 SHA-1: 3a2ccb62a9cb38c2b408c9be7097833862410016 SHA-256: ed7a02138570c244a0ffbacf413ce54cd775d6cfc522cb483bfb23dc720db1e0
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at `ttraff.ru`, which is disguised with a keyword related to Excel VBA. This suggests a social engineering attempt to trick users into clicking the malicious link, likely leading to a phishing or malware download site. No scripts were extracted from this sample.

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=excel+vba+lookup+value+in+another+worksheet
    • http://zifibera.andorranetworks.com/uploads/1/3/1/3/131398425/teguza_baroliragikov_nudigitojafe_linevokoxates.pdf
    • http://files.hospicecareteam.org/uploads/1/3/2/7/132740958/zerezonulum.pdf
    • http://files.kaylaschmidt.com/uploads/1/3/0/7/130739093/ruravotodafuvo.pdf
    • http://files.mindfulprograms.com/uploads/1/3/1/4/131453111/4577458.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2325/files/lavovesanedarekuwel.pdf
    • https://cdn.shopify.com/s/files/1/0428/7250/4483/files/67907891176.pdf
    • https://cdn.shopify.com/s/files/1/0428/1516/0487/files/satipopirikusududibabe.pdf
    • https://cdn.shopify.com/s/files/1/0437/1572/3414/files/global_strategic_management_process.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5464/files/38717710464.pdf
    • https://cdn.shopify.com/s/files/1/0436/3016/6176/files/rutexegutef.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/gungeon_weird_egg.pdf
    • https://cdn.shopify.com/s/files/1/0439/1315/0632/files/land_rover_parts_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0431/0319/1193/files/angularjs_export_excel.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_off00007805.bin
dc52d7b7cee0548e774a7a136964be7788723d4447b59777d20c299e5c410151		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7805 5404 bytes
font_01_sfnt_off00008a6a.bin
acce6cf46fc69b479ce02ce0f8e58ba9fb8d0e268d774753459a3bb1f7090918		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6A 10612 bytes

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