Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf8fb906d2d20e81…

MALICIOUS

PDF

47.1 KB Created: 2020-08-31 21:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6ad85397f6c49f62ab864334cf4770e SHA-1: 751f84094201c4e35097b0bb3f3d64d4eb759c03 SHA-256: bf8fb906d2d20e814dc41cd9bb812ce8d967f33bcc22982fc0e56d0893f14ac1
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.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be luring users to a malicious site via embedded links.

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.com/wix?keyword=bothell+reporter+police+blotter
    • https://cdn.shopify.com/s/files/1/0436/9409/6539/files/catalogue_inax_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/19035884288.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/wulefegejelifugujipagod.pdf
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/86210165569.pdf
    • https://cdn.shopify.com/s/files/1/0438/9309/6600/files/46422943054.pdf
    • https://static.usrfiles.com/ugd/77d535_b2b9fd0e0bce485eac65a5686aeb056f.pdf
    • https://static.usrfiles.com/ugd/96bf9d_0bbaa29a8a554bd694dc3074d3f59e9c.pdf
    • https://static.usrfiles.com/ugd/19103d_87efcc4d1f91403c8d3940944005304f.pdf
    • https://cdn.shopify.com/s/files/1/0436/9498/1273/files/superannuation_employer_contribution_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/1118/6588/files/63531022799.pdf
    • https://static.usrfiles.com/ugd/24853a_60f7de8e74604d3596e3454fe6f037ca.pdf
    • https://static.usrfiles.com/ugd/b8c837_258dbef9c76f40558bbbdbc32dbe1360.pdf
    • https://static.usrfiles.com/ugd/3bca44_aad96c44e809402db9fcd6990644e589.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006726.bin
aa81b5d068f80c905dd05a41b514f1eed4763291ee1f3ae055fb0bb1ceab505e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6726 4504 bytes
font_01_sfnt_off00007681.bin
60949711089c673380b90788cd2d9b20963e78afda9aef2591d8e2f029bb493b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7681 13544 bytes
font_02_sfnt_off0000a14e.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA14E 4324 bytes

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