Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f0235bd8d26729…

MALICIOUS

PDF

39.0 KB Created: 2020-09-05 18:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 028a8f941c4dae86a1585e590cf55e4d SHA-1: bc870b1de24122fc359c6ece7d8a012d4f35a81d SHA-256: 76f0235bd8d26729ec0d3beacd669261a65c618d4371b63274518934f02ec454
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=consolidated+reports+finra'. The document body also contains this URL, suggesting the primary purpose is to redirect users to potentially malicious infrastructure. The presence of numerous other PDF links further supports a link farm or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=consolidated+reports+finra
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/938c70_ba11c7498eeb471782e9aaeab82da2c3.pdf
    • https://static.usrfiles.com/ugd/1da05d_8e20134e6d7b4cf6abde9c6a29a4ea5b.pdf
    • https://static.usrfiles.com/ugd/8acad3_5fcdbad6682a4cbba826ee8855592346.pdf
    • https://static.usrfiles.com/ugd/a771bd_0d2d0a78c99c4310becde5a6dd5ce9fe.pdf
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/63347816808.pdf
    • https://cdn.shopify.com/s/files/1/0432/8210/4478/files/xivifekolab.pdf
    • https://static.usrfiles.com/ugd/d1fcfc_12d1ed54b8674975ab9feaa144f09048.pdf
    • https://static.usrfiles.com/ugd/96768c_48e415258a1740cab4198d19387d8976.pdf
    • https://static.usrfiles.com/ugd/ff2e72_bdbb6b31b26d481e814dbebab3a0f832.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cba53c8fb9c404482634ad67dad745b.pdf
    • https://static.usrfiles.com/ugd/ade4e6_e8a5ddae024b4e92bf541f9c23efda3a.pdf
    • https://static.usrfiles.com/ugd/80c1db_23c5cd8318104d8b830bd7f0d87bb87b.pdf
    • https://static.usrfiles.com/ugd/b96e41_06aa64b1a0f4455497e09a3d2e45c95e.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c61.bin
62375758562a6bda5b7fb492ed23a64f07074a643858eee83033b416a0b086e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C61 4940 bytes
font_01_sfnt_off00006d34.bin
088daf24c05bcace97a031f6d77f905bec2c00f1a32113685c22c72a609efefd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D34 10040 bytes