Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fef252187f772f9…

MALICIOUS

PDF

40.0 KB Created: 2020-08-31 01:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 475bbfff73eb2ce9f796d909d7a4de3f SHA-1: 72ff917118ee0e1205b89cd99f1f929f0d6e508c SHA-256: 3fef252187f772f9011ed57f345ec840edb4ba95d47f5693b66d742a3b72fdf7
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The primary malicious URL is https://ttraff.ru/wix?keyword=britax+b+safe+35+car+seat+installati, which is likely used for phishing or to serve further malware. The document body, though heavily obfuscated, contains references to the same malicious URL, reinforcing its role in the attack. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=britax+b+safe+35+car+seat+installati
    • https://static.usrfiles.com/ugd/b8c837_bb2dab041f91476bbe2e1167e20a9945.pdf
    • https://static.usrfiles.com/ugd/5360f8_3dcf6bc7f6f940b399dc2b27ae253f3e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1e07387318ce4705b798c2e772f050b9.pdf
    • https://static.usrfiles.com/ugd/9e41f0_b7ec77f66df241a98741cfb09ef31255.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6a9c76e23574a8d8e6dcfbed89c3fa2.pdf
    • https://static.usrfiles.com/ugd/67f5f7_af0fb47e21aa4f1ea7d8f4b7ae51efb5.pdf
    • https://static.usrfiles.com/ugd/3bca44_d7a64dc95db946afb6c9da7a6041df18.pdf
    • https://static.usrfiles.com/ugd/b8c837_23fecec424ef42d7b54f54670bc68783.pdf
    • https://static.usrfiles.com/ugd/b8c837_e3a54f9e10504ccda4b2910aa5eba357.pdf
    • https://static.usrfiles.com/ugd/b8c837_14dec97735fa48d18d97a2085a82bd09.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_off00005e06.bin
4271ef8ff1d8da9e26ab81da7bf309eec51112e9e90852c47468fc6b1d26e18b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E06 5420 bytes
font_01_sfnt_off00007085.bin
d54e12f62a77879766539bcf1444518cafc32628b60a79357a88a145611ed8ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7085 10240 bytes

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