Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2d76e74e4aee1be…

MALICIOUS

PDF

49.7 KB Created: 2020-11-05 05:58:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 3597e9c564f31970fbb621096d7dc4fd SHA-1: c54c256873db892c11910c7ab71ac062b057bc55 SHA-256: b2d76e74e4aee1be8e9830f351fec771ee88649ee086cf3775825c0e1fa1ea27
134 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.me/123?keyword=apush+chapter+2+test In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368740/normal_5fa02dee5b1a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f877e8a29552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5f8ed1141f9ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413983/normal_5f97df7b635a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382413/normal_5f92a11c11373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424009/normal_5f985796a3d37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/84488828274.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/trupanion_pre_approval_form.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/76938427550.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/23276217854.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/kowalusoxigixavixu.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/54280358214.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_off000085b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85B0 5108 bytes
SHA-256: 0ad1873ca40a15368ae8c4ff855972bf070b2d9348c453b80e17e36e863c0525
font_01_sfnt_off00009709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9709 10304 bytes
SHA-256: 025a4ca24b0d5ecdc2ae6528c71f3b2991159e43a9297e61cb05dad820a768f8