Malicious PDF — malware analysis report

Static analysis result for SHA-256 df95b36059af3a0b…

MALICIOUS

PDF

50.5 KB Created: 2020-08-31 06:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dad5daa8e1bd285986c294df64923de SHA-1: 2dd361a63b2620739494b8c4888b6e7f2b88dacb SHA-256: df95b36059af3a0beba3592b68da0fc4fcb9ac3496fc68f70c59b6c1d787305d
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The embedded URL `https://ttraff.ru/wix?keyword=mastering+the+boards+step+2+pdf` is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other embedded links, suggesting a social engineering lure to trick users into clicking on malicious content. No scripts were extracted, limiting further analysis of execution behavior.

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=mastering+the+boards+step+2+pdf
    • https://static.usrfiles.com/ugd/db1da1_7d318380636b4bc6a61752eeed39d47e.pdf
    • https://static.usrfiles.com/ugd/b8c837_82ebb2b9cc4f49bcb732a2ef894610f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffe5f4d356c04db99c343782e2aaf3dc.pdf
    • https://cdn.shopify.com/s/files/1/0430/4545/3985/files/baldur_s_gate_enhanced_edition.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5fdf1e2391744ed851fe6f5b12bb720.pdf
    • https://static.usrfiles.com/ugd/1f2646_a5e1d118eae94389b4f9037f4f08d4ed.pdf
    • https://static.usrfiles.com/ugd/0c41e7_34b93cffdd9e4c778acc20db8a3b7c10.pdf
    • https://cdn.shopify.com/s/files/1/0464/7688/6168/files/93421969777.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6048/files/descargar_guitar_hero_world_tour_para_pc.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
stream_006_off00009e9e.bin
76f95ff46b32edd1ed83a872ce6fa89e1f22452bec83ccde777a4ff8e0239f81		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9E9E 19056 bytes
font_00_sfnt_off00005ecb.bin
48152035c87535566c3bacc4279c22d6cd84f40811d2057b61714960ca5d6e7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECB 5548 bytes
font_01_sfnt_off00007190.bin
dc37461816ec92f0ed1316601fd5c6b06f5c1a5be203c138b3c3c6cdf5da3806		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7190 2024 bytes
font_02_sfnt_off00007b28.bin
0ace51d5e470b85ac1c764116bdc8da023c04e6c6cb7351bd3bfaaef2c7e469c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B28 10316 bytes

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