Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6e06b179e52f2d3…

MALICIOUS

PDF

42.5 KB Created: 2020-09-04 09:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b621aa2a50156ca3a8a463845c9c4b50 SHA-1: 6143bea285451810c1c990883272199ec0a7bcb4 SHA-256: a6e06b179e52f2d37a3489bf201811ba006fcdf08c21702581922a8717d50c7c
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=billings+gazette+fishing+report'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many pointing to 'static.usrfiles.com'. The document body, though heavily obfuscated, contains the same malicious URL and references a 'fishing report', suggesting a social engineering lure. The ML classifier strongly indicates maliciousness.

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.club/wix?keyword=billings+gazette+fishing+report
    • https://static.usrfiles.com/ugd/cfa91a_2465b84b00ca4b32abab6210c23e90f4.pdf
    • https://static.usrfiles.com/ugd/3bf302_28b53ca495ec4914a8f42e291bc9f3dd.pdf
    • https://static.usrfiles.com/ugd/1fa6dd_fddca7c48f3e42e8aaa70ce187dd9bf1.pdf
    • https://static.usrfiles.com/ugd/370b54_5e9d3ad777b84b31869516f0b2388377.pdf
    • https://static.usrfiles.com/ugd/eda9ba_f95016dc7733443bbdb20f8e4e5e3432.pdf
    • https://cdn.shopify.com/s/files/1/0452/2960/5024/files/46263420298.pdf
    • https://cdn.shopify.com/s/files/1/0438/4168/3618/files/modivudi.pdf
    • https://static.usrfiles.com/ugd/77d535_f55ed27090fd4ab2953619a73fd60ca8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f702f7ca07b3449f80b3d98b7fa04ab3.pdf
    • https://static.usrfiles.com/ugd/a18aa6_c9a6cedb7e7d4f92b7de76309d677c70.pdf
    • https://static.usrfiles.com/ugd/b8c837_54acd1b4359e40bab030e4b644c34145.pdf
    • https://cdn.shopify.com/s/files/1/0440/1342/0702/files/samunodamivakiluvejevon.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4965/files/pover.pdf
    • https://cdn.shopify.com/s/files/1/0433/6667/8696/files/jedolafadosipelawamazu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/69701692306.pdf
    • https://cdn.shopify.com/s/files/1/0434/2710/2887/files/contract_extension_agreement.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_off00006844.bin
f31a5424e58379dcfe3977d1410c70477922709be52685777560d7ae97fd3cb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6844 5260 bytes
font_01_sfnt_off00007a36.bin
a5b6cd560fa96ab29cf2bf31514956ca8d771b8cf47d1d819ba61929f7516eb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A36 10120 bytes

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