Malicious PDF — malware analysis report

Static analysis result for SHA-256 003c438ac003a77c…

MALICIOUS

PDF

81.6 KB Created: 2020-09-03 09:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8fc74cf72c52b1043042362d163250b2 SHA-1: b73711ecadf42efe5a639f252de57c87b875ef9d SHA-256: 003c438ac003a77cf26345e009eadee2561d8a18fe9e2fa1d9b5ce7c32d7d680
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, ttraff.club, which is disguised as a search result for "cg video song 2018 free". The document also hosts a large number of external PDF links, suggesting it is part of a link farm designed to improve search engine rankings for malicious content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=cg+video+song+2018+free In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d08e66f3697f460c9e137037aa97b765.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1cbf32c67fcd438ebdac23d0626f80df.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ca300b_bacf7726faf441e6ba657f503262f6e8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3701/5719/files/159998140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/canon_eos_800d_specs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8311/1325/files/belkin_netcam_hd_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/93157889115.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/90423f_edc22776d17c4894968f196d8f3ac048.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e5a943_43108a876f584ff8aee4401219e2519f.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CB 5316 bytes
SHA-256: 87e0271413a485392f4ff8ef4b0de31ef4f940f6c0ff9e9efdbddab3ebf2ba21
font_01_sfnt_off00011405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11405 11724 bytes
SHA-256: b21e8eba270722234b32fc08bcd2b65ffeabaf01e0f8b7d73437ce26fab33219