Malicious PDF — malware analysis report

Static analysis result for SHA-256 f45c5b663694df14…

MALICIOUS

PDF

50.8 KB Created: 2020-09-01 11:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bfa30417b730ceb3020faa589ea7661 SHA-1: 50b17467058f5d0dbb30cc07f7835205444ff6ed SHA-256: f45c5b663694df14b02f9d829c40f5d6c7b4fe62fe9ddd866ba63fd6f4c43a4a
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.ru/wix?keyword=adobe+audition+cc+2018, which is likely used to lure victims. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The presence of a large link farm suggests an attempt to obscure the true destination or to leverage SEO techniques for distribution.

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.ru/wix?keyword=adobe+audition+cc+2018
    • https://static.usrfiles.com/ugd/b52961_bd9dc7c4c08a4f7fa9463616cab1d7ed.pdf
    • https://static.usrfiles.com/ugd/12f4eb_03037238a0764d96bb925ab091e248ef.pdf
    • https://static.usrfiles.com/ugd/97368a_17511a1b216b426b8bb84a7a5f6405b6.pdf
    • https://static.usrfiles.com/ugd/40512e_9ffe7d9fc83647128c725cda72fbd16c.pdf
    • https://cdn.shopify.com/s/files/1/0447/8212/5205/files/alpha_beta_pruning_in_artificial_intelligence.pdf
    • https://cdn.shopify.com/s/files/1/0446/6071/9779/files/95789465613.pdf
    • https://cdn.shopify.com/s/files/1/0439/4372/3163/files/baradalodipomiz.pdf
    • https://static.usrfiles.com/ugd/f515ca_2cff7ce401394427a226cb237d2e0699.pdf
    • https://static.usrfiles.com/ugd/07e02c_f0c16b0476d244cf84e15565cb03545b.pdf
    • https://static.usrfiles.com/ugd/0c268c_f4553d85458e4854820915fb0e4acaf0.pdf
    • https://cdn.shopify.com/s/files/1/0436/9616/0921/files/xutedopaxibiwejubupa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5344/9365/files/adventurers_guide_5e.pdf
    • https://cdn.shopify.com/s/files/1/0457/5297/5516/files/wodipezumifepolopigudu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1259/files/janesville_movie_theater.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/69425556780.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066af.bin
ad6b4f76809b3fa46f828f1d4d31edce04b160bdeb1fded3e270ba31d887846e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AF 5400 bytes
font_01_sfnt_off00007918.bin
8d7e0451461f75ac1d9cf877dfde88428fca48f9cbf29fc9207b0b8be17574b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7918 5156 bytes
font_02_sfnt_off00008ab2.bin
5340c9e748ce8e8d447b157cd50a2c3b56c33b11abd438599a47124b67223e92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB2 10684 bytes
font_03_sfnt_off0000aea0.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA0 4324 bytes

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