Malicious PDF — malware analysis report

Static analysis result for SHA-256 f165d0e987e80199…

MALICIOUS

PDF

51.8 KB Created: 2020-08-30 19:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: baabdc8dbe7dcafc49363d7d11210c8f SHA-1: b988fae21f5eba512299fb1bb0ab323bf0bcbfe5 SHA-256: f165d0e987e80199c1360c3944f0e6f6e58532bac8229629d6c0d20dd6181e69
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.com/wix?keyword=analisis+de+luces+de+bohemia+por+capitulos 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/cc089a_910f385a400e424fb7f374375089e1f3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/95089d_672edf52b0824d96ae397ba19b927f53.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d4b67e8fb83c46218541209c9ce3af79.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2084220e84e24cd7899870b41787710d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7f16bd_001f4733a32448e09f3c368cc641e725.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d49e548761f04ac7bab9f093532df1fe.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/82e28d_dfeab7cd3e454c91a3875194b64a0ff4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3654629aa2064e9a974cda5dc80845c2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_89deb405e9c14ee8831dc4f28eac3b67.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a467d2_92974f3bf3cf4cce9d91e19b0b5b23be.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_632e2fc9bd0c4c289cf19488c141f50f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8acad3_f055a528809749549c60186802d39d8c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f96b02_b9eca0be256944a49597a1801cb59290.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_bdcfd85f4cf94ac19686e48e7022ee2b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/77941b_3c87cee5925541ce8f5523f528cb502d.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A89 5444 bytes
SHA-256: f6c03aa81cd74de5ba3aa90969d81c5031f2b01e9ad356aee8dfd465b1e1cfa7
font_01_sfnt_off00009cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CBF 10876 bytes
SHA-256: 8a8a509f73f50f3097a3f2a489ca5666828ad84ef2dfeed228f47cf10c22346d

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