Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca169830d3ac4b3…

MALICIOUS

PDF

40.3 KB Created: 2020-08-31 08:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c1711204a8fd13a518bfd95bdd011b6 SHA-1: adb9770f9ff60eb12d733fcb9abb9324305a6eef SHA-256: fca169830d3ac4b35f9e91458ef1b9d749f62ce4bfd5ff86c7e71fb5a38a2d4f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a large number of embedded external links, a technique often used for SEO poisoning or to distribute malicious content. One of the URLs, 'https://ttraff.ru/wix?keyword=all+the+bright+places', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other URLs hosted on 'static.usrfiles.com', suggesting a coordinated effort to direct users to potentially harmful sites. The presence of numerous links points towards a link farm or redirection strategy.

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=all+the+bright+places
    • https://static.usrfiles.com/ugd/837d34_508e4ffd281b492280cebf5be14ea601.pdf
    • https://static.usrfiles.com/ugd/ae059d_9aa8d89452274a86a539280f13d9ca06.pdf
    • https://static.usrfiles.com/ugd/735424_dc28955bd50e4dbc9c1cd2eda2200d9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ff7f1d9d89e4e2789087cad1ca41012.pdf
    • https://static.usrfiles.com/ugd/9e41f0_288ff828dd96484bbc00d109a393bb3c.pdf
    • https://static.usrfiles.com/ugd/15ebe2_94066aa652c34c80ac37ee98679c1b3d.pdf
    • https://static.usrfiles.com/ugd/67e251_85bb045e17b042609b2fe203a91c3435.pdf
    • https://static.usrfiles.com/ugd/270e53_aa7fe76fc6de4db8a8cc41b23e8d06c2.pdf
    • https://static.usrfiles.com/ugd/97493d_3c05c911d180494fafa7359e5dfd33af.pdf
    • https://static.usrfiles.com/ugd/b8c837_0456f83b53964426a41325bac41d8f95.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9af000aa86d462abb3dd7bdb27041ae.pdf
    • https://static.usrfiles.com/ugd/3de8a6_2346d4769197445b9d0b6ee940188644.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_off00005e84.bin
853013dbb8fb87d0268db01dde006de6b94c4c7d05fe82e25c0a47feab26d5bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E84 5324 bytes
font_01_sfnt_off00007090.bin
10618f3aa207d50d2bca48678161740c5eccd0d1facf55778c5598b3bd7b7581		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7090 10708 bytes

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