Malicious PDF — malware analysis report

Static analysis result for SHA-256 26fa308ef8444db2…

MALICIOUS

PDF

52.6 KB Created: 2020-11-05 08:21:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-19
MD5: fb843de28ce582d0a65caff7ee9fbae0 SHA-1: a4f5d730abfdf00f7ff9f8a9ebad8a824b31c0a6 SHA-256: 26fa308ef8444db2b2acac08b22c634a6dce870225789fb1841e4b8f12e139ad
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://ggtraff.ru/123?keyword=president+as+chief+citizen+examples In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5f90d87d9df24.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/terrarium_tv_2020_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/97005909031.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384650/normal_5f8f20f3de76c.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/vomakutupib.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/28397529927.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/original_bhagavad_gita_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/walod.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/pokemon_go_tracker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369308/normal_5f917e721882a.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000609c.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000609c.bin)
    • https://uploads.strikinglycdn.com/files/d39e29ed-35b6-4795-a078-8f91cd0dfb31/73060531265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ac24cd-a639-4812-9ee0-4ca20cf1db58/90860532874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50bb4f0d-e262-4aa2-aaf7-7fa88c37bed4/12752034149.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://dejavu.sourceforge.netIn extracted file (stream_005_off00009861.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_005_off00009861.bin)
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off0000609c.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009861.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9861 25320 bytes
SHA-256: 2b1c2ea7a7daf4fabc3bb3a69a5ee89af9bd7f7866b749f9e0099ffdcf19ea7b
font_00_sfnt_off0000609c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609C 5516 bytes
SHA-256: 73c60fa6388d403d5a38fc964154fe3cfc617d8f955ba30ee0a9327f1d308853
font_01_sfnt_off00007347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7347 10836 bytes
SHA-256: ecc58369ee42d851277087786ce4a10c665b6ff72fa42de0c1da31744d31063c