Malicious PDF — malware analysis report

Static analysis result for SHA-256 59a2af054b27faea…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 13:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5aae7b06a29dd07e05b078c90cbdf807 SHA-1: a36d2c452a39970047a7270d85739838ed69688c SHA-256: 59a2af054b27faeab939e72bd219a5cda916203089755c558baf5e3ae157e872
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, disguised as a search result for free sheet music. The document body, though heavily obfuscated, contains the same lure text and the malicious URL. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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/pify?keyword=free+sheet+music+happy+birthday+organ
    • https://static.usrfiles.com/ugd/6da380_5e9c4947a26844158610ff3d34eb6aeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc77888b63c54c609c48469be275e08c.pdf
    • https://static.usrfiles.com/ugd/963627_33a67df1c4cb4ab693223e82404aff06.pdf
    • https://static.usrfiles.com/ugd/26938b_95a2c0438064486ba4cb7e946c471567.pdf
    • https://static.usrfiles.com/ugd/868401_2693791048674277937547fb7952648e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a38d6fa4cb47484080ed3b800154c22e.pdf
    • https://static.usrfiles.com/ugd/3eed2b_c27e6b3990ba4b7595a90bad506b62b3.pdf
    • https://static.usrfiles.com/ugd/8de238_b89538ca568d46dab24120386c19bbf4.pdf
    • https://static.usrfiles.com/ugd/b8c837_34ba526493014eeca1fba63be6c826a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_917d8b2a606b423bbe4aa9011b4cbacb.pdf
    • https://static.usrfiles.com/ugd/856cea_39ac06ad424141ee9d56e6f5e0c746a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_80d06a40ee0e4830a329fd06d61ebd6d.pdf
    • https://static.usrfiles.com/ugd/270e53_60cf84fcc54f4440a43e804f7ff4eff5.pdf
    • https://static.usrfiles.com/ugd/b0cd75_8990972871304ae4a71f937c53ebd60f.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_off00006458.bin
23cc89f922a814016feddeb6815b68477759f0efa7fa957413eaa06800400c64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6458 5652 bytes
font_01_sfnt_off0000776e.bin
6c259596f9b40aed958342096f2fa3afc823952c41cefa059709b41804f34e08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776E 10484 bytes

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