Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e395f3e23bd400…

MALICIOUS

PDF

54.9 KB Created: 2020-08-29 02:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61fa7f609331949a11b43aa1dacf811e SHA-1: f9cfd1f1d73ed4e866c7fd2b97392b14a7e3f64b SHA-256: b5e395f3e23bd400786c6d8b448db12c31a8fa46b016535a8f432d50947bbbc1
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=metodo+slp+ejemplo'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of embedded links, with the first being 'https://static.usrfiles.com/ugd/b8c837_a74e255dcd2b4b539ed13d5452bb075e.pdf'. The document body is heavily obfuscated and appears to contain the redirector URL. The primary attack pattern involves luring the user to malicious infrastructure via these links.

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=metodo+slp+ejemplo
    • https://static.usrfiles.com/ugd/b8c837_a74e255dcd2b4b539ed13d5452bb075e.pdf
    • https://static.usrfiles.com/ugd/b8c837_feb4ded13b18475f87ee62feb8003bf0.pdf
    • https://static.usrfiles.com/ugd/b8c837_edfa53a2e3a74d12ae222b402f5bbddc.pdf
    • https://static.usrfiles.com/ugd/b8c837_e835c8c5d900456da26b5ef66bba75af.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a4153a7e19d47fa837278ad535180e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_c348125c14e743af95484c08f42a5667.pdf
    • https://static.usrfiles.com/ugd/b8c837_f792ba54f7334e22b0ec3c5a7773eb15.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4bf6b409ea74fed8cf0887e40321912.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8f53c211b3440dca582c351ccc17b96.pdf
    • https://static.usrfiles.com/ugd/b8c837_92e0454bf5904252b6e5a039499a1143.pdf
    • https://static.usrfiles.com/ugd/b8c837_ead31749629042c5bea6a0dfa8203bb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_107866949d12479e8bdfa877311bbf5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e96e6d9c99754abbb5a9873e870e0959.pdf
    • https://static.usrfiles.com/ugd/b8c837_15905acc585e43af92e417bf7040f5e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_a23d302d84f44745abc39ae295659b60.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e55b0cc4d754c5d9fd1f23723768bd5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6019ff8e958f41e58820a011ac57f7fc.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_off00008789.bin
c5669b645d71e4e5700bbf088c69487315cafabad4a155f9bbe379fb527ffcba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8789 4516 bytes
font_01_sfnt_off000096ff.bin
784bdc13642294b96b5104ada5f3978e6e0ae2b11fd215af7ae4549c9146030e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96FF 13064 bytes
font_02_sfnt_off0000c0b8.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B8 4324 bytes

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