Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df05ffca8c96ba3…

MALICIOUS

PDF

71.1 KB Created: 2020-09-11 10:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e69372c90f412aa004fc637c038ed878 SHA-1: 4474eae2536a95a96829889e00243e28a26a9da0 SHA-256: 7df05ffca8c96ba3c27627f3062593a9191a85ad01d32605808922ec4cd59e73
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, which is designed to lead users to potentially harmful websites. The document also features a link farm, suggesting an attempt to generate traffic or SEO manipulation. While no scripts were directly extracted, the PDF structure and embedded links indicate a phishing or redirection attempt.

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.club/wix?keyword=brain+arteriovenous+malformation+radiology
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/nirolokogixuliwo.pdf
    • https://cdn.shopify.com/s/files/1/0466/2886/4165/files/64698509094.pdf
    • https://cdn.shopify.com/s/files/1/0433/3977/6159/files/mechanism_of_action_of_atorvastatin.pdf
    • https://static.usrfiles.com/ugd/1e8759_5a6b371d9165457d89ad2782fcb594b9.pdf
    • https://static.usrfiles.com/ugd/964009_e45f6f72fa504b0da1e072d6499366a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_de4e80c054064e80a40c774c694587f4.pdf
    • https://static.usrfiles.com/ugd/185c00_e6c6bf84abe3465299d263a3cb08b775.pdf
    • https://static.usrfiles.com/ugd/97634b_b9fb8c08408349ff8a4cf8c7e50da9dd.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_989c178927814bd784f5d64cfda40e22.pdf
    • https://static.usrfiles.com/ugd/ce5d00_b889bcc8d93d48d6a60dded40c6f7c46.pdf
    • https://static.usrfiles.com/ugd/b7306e_96fda85d8d184e66a1e0c1a0e78ae9e9.pdf
    • https://static.usrfiles.com/ugd/682d1c_3fb961a5e7ef4cf99e94110b0eaba1eb.pdf
    • https://static.usrfiles.com/ugd/cc1a03_9e19007f47dd49c5874ef5883e425f4a.pdf
    • https://static.usrfiles.com/ugd/ac8c68_1f90927917c940b3a2d958d23c6ce72e.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_45928d0efe1f4e47b9e4c7a64610cf1a.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_off0000d26a.bin
6e7ee18c20db33b6a70508c2dab93965575819d283db90d40847ab3d017d5dae
pdf-font-stream PDF embedded font (sfnt) at offset 0xD26A 5440 bytes
font_01_sfnt_off0000e4e5.bin
67a82d183230d0ad486fdda3a320c9aa9aa08f738f1411e79ee95b6de23dc088
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E5 13452 bytes