Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9dc9db21dfb6e02…

MALICIOUS

PDF

41.1 KB Created: 2020-08-31 10:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2fb51eba71406f9e6a30ed449e4dca0 SHA-1: e2d19010d73bcaf12140e6061f8314ba25d42b28 SHA-256: e9dc9db21dfb6e02d68add4e61d16f180ce979b275b00b09f295c24634966b8d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=gary+halbert+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for the attack pattern.

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/wix?keyword=gary+halbert+pdf
    • https://static.usrfiles.com/ugd/f14cf6_33bf5f66ac594fcf86ba4a7daca8e921.pdf
    • https://static.usrfiles.com/ugd/b8c837_424d2e06a9b944198bb36cef0e58beaf.pdf
    • https://static.usrfiles.com/ugd/b8c837_bab9f404033e4ce4b65b09eed1eab69d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d72bf1bb1da8404abea58e9d5f721bac.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbc05465ae0a4ac48cead0826860b0c9.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/kaeser_sm11_compressor_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/yearly_free_credit_report_transunion.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0632/files/mumotovolajeborug.pdf
    • https://cdn.shopify.com/s/files/1/0434/5911/7206/files/wells_fargo_retirement_loan_payoff_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/dezumuviwapefo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/everfi_module_6_answers_renting_vs_owning.pdf
    • https://cdn.shopify.com/s/files/1/0439/1721/3864/files/73580884509.pdf
    • https://cdn.shopify.com/s/files/1/0436/4884/3929/files/bebar.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_off000060bb.bin
133ba9585d1baa28a4cfc14dfb2a54ca5984b3da234810ea789af98069dd0eff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 5224 bytes
font_01_sfnt_off0000728a.bin
8ef666f83df2352c185add548248300fc9c7505727cb9606e5327e630522eda9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x728A 11064 bytes

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