Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c5e7237bae791e…

MALICIOUS

PDF

34.1 KB Created: 2020-09-05 14:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0018fa453ab1f1f628afb4c603c5eef7 SHA-1: f328aa14a6594e41e354394f3cc707b0b9d05bf5 SHA-256: 87c5e7237bae791e9a66c4d274caa378e167a454e65e99ff5b024b1f96cc5cc5
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=ocarina+of+time+theme+sheet+music'. This URL is presented within the document body, disguised as a link to sheet music, indicating a social engineering lure. The file also exhibits characteristics of a link farm, with numerous external PDF links, further supporting a malicious intent to redirect users to potentially harmful content.

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.com/wix?keyword=ocarina+of+time+theme+sheet+music
    • https://static.usrfiles.com/ugd/c7a620_ae63001b703243a1ace0b5678dd92b65.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_5f9c2fe393084da0855e98d85aa727ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_e97a4c2bb7ae48c3aba4fe4fdf46d109.pdf
    • https://cdn.shopify.com/s/files/1/0428/4832/1702/files/soredaropesebiron.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/sujelanarawabumopudurubid.pdf
    • https://static.usrfiles.com/ugd/8ebb60_998d1ca70ee5478094240ae475cb4988.pdf
    • https://static.usrfiles.com/ugd/b6aaa0_6836ee06fe2b4d7ea5dae0df1ee3ac76.pdf
    • https://static.usrfiles.com/ugd/359e64_f51110e4828d4f3e97c4316c6a3dfeb0.pdf
    • https://static.usrfiles.com/ugd/b8c837_153ecf9950d243c89120531898891fff.pdf
    • https://static.usrfiles.com/ugd/08fe48_b9892ee4d74a4867a3098a4f7347f232.pdf
    • https://static.usrfiles.com/ugd/8cbfce_9813aece7c944cce9ba74292cdcaaaa6.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_off000047c3.bin
b94a30f11196bab9978e0482bd7b5a14f7d00617726c28ad2f54c9b803222068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47C3 5116 bytes
font_01_sfnt_off00005902.bin
b1097fe525c43d5b4a1289ab55a7028e15bf91bba32e9857c1b742276b45e2fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5902 10232 bytes

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