Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d5720f48dacd76…

MALICIOUS

PDF

42.7 KB Created: 2020-09-03 05:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0776a15af6f57078d8eb448b4815693 SHA-1: 553b4f04fb71014c1e47852c69d2be8aec62176e SHA-256: b2d5720f48dacd7673c3fa12faa001c41214e1441c83e5cccebc33bc50508b8b
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a search query for sheet music. The document body, though heavily obfuscated, also contains this malicious URL and numerous other links to PDF files hosted on Shopify and other domains, indicating a link farm designed to obscure the true destination. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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.me/wix?keyword=bohemian+rhapsody+classical+guitar+sheet+music+pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80787326618.pdf
    • https://cdn.shopify.com/s/files/1/0433/4390/4927/files/aliens_among_us_movie.pdf
    • https://cdn.shopify.com/s/files/1/0437/0890/7688/files/wenejefuvu.pdf
    • https://static.usrfiles.com/ugd/1decf9_fc89bf081c4d4310aeac4ba7c94cf448.pdf
    • https://static.usrfiles.com/ugd/b8c837_4f9d7878fc5d424aa2ad22b1841f14e4.pdf
    • https://static.usrfiles.com/ugd/db1da1_d86f1f1514cc44d8a6facfd7e0b7150b.pdf
    • https://static.usrfiles.com/ugd/b8c837_3565d4abd4c442fd8fe0d5a074a5f5d2.pdf
    • https://static.usrfiles.com/ugd/c1108c_892f8615944c46ba8aa81cd8e575cce9.pdf
    • https://static.usrfiles.com/ugd/ac72e0_739e34178b3343b6b6a32b441abf1699.pdf
    • https://static.usrfiles.com/ugd/3d514e_dd15d71ad3904c29ad6efe0c5faba557.pdf
    • https://cdn.shopify.com/s/files/1/0434/8932/9312/files/reference_consent_form_template_gdpr.pdf
    • https://cdn.shopify.com/s/files/1/0439/2275/1643/files/birkenhead_high_school_academy_uniform.pdf
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/ccna_cyber_ops_dumps.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/78340453068.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_off00006734.bin
f4b32ed9cb2bcb12bf0f775201fbb8e15702b5d0b1b651f7e76c485ed57b4e9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6734 5720 bytes
font_01_sfnt_off00007a8d.bin
75c2927a5489aebb0f54d2b1f80b6baa70da6c0aaa39d8eec64539f891811688		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8D 10324 bytes

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