Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc67f55fa9c319d…

MALICIOUS

PDF

45.6 KB Created: 2020-08-29 09:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c132fc6693de9f45d460067614643e6b SHA-1: d5bf98789ab3e02da0dfa13bace757255ca2b035 SHA-256: fdc67f55fa9c319d40d5e856008d5b3b881e7957cf9dfe9585a29741feb22ef6
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The primary malicious URL identified is https://ttraff.com/wix?keyword=tipos+de+sociedad+tradicional, which is likely used to redirect users to a malicious site. The document body contains garbled text but also includes the same malicious URL, suggesting an attempt to disguise or embed it within the content.

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=tipos+de+sociedad+tradicional
    • https://static.usrfiles.com/ugd/b8c837_d5cf7038ba8e407aaeb3b2ee5859a905.pdf
    • https://static.usrfiles.com/ugd/b8c837_594b8dfe8dc34ac1bcaae8dfa4a08d61.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ac03c2346a04cdea2a4c90124fc6950.pdf
    • https://static.usrfiles.com/ugd/b8c837_8fba20c10aed4626bec197012fb0036f.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecad0d7bca214b138d172fd96b1fdc1e.pdf
    • https://static.usrfiles.com/ugd/b8c837_d08a0134108a41e787762ba4e8b11739.pdf
    • https://static.usrfiles.com/ugd/b8c837_49071d4b9ba74fe3a057b0abc313b61e.pdf
    • https://static.usrfiles.com/ugd/b8c837_465373ec0b344726a94903262a0b3410.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cdb85e260694944968d6c7e18b42741.pdf
    • https://static.usrfiles.com/ugd/b8c837_4dc0cfc814ab4fb38b66e5784fbee6c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_409c019efa9f4aa28a7a617c0d06b294.pdf
    • https://static.usrfiles.com/ugd/b8c837_747a42275f134dae8effc597c3b69d3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_09f5b5f3388c43819f87043d596780e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ed621cae4ff4374b95ba5c56f3b0acf.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d26bde9358f46738994561997787869.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_off000071de.bin
11e1e4b3baa3b03f105af130ef59a43ba989a0e3fe3da0241af8a5dfa712d864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DE 5016 bytes
font_01_sfnt_off000082ef.bin
9a8569b1aed415491bab399bc3cc0de103c6ce2ba2661825476bf2b5207e5cb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82EF 11552 bytes

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