Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aff1ec14247c9b6…

MALICIOUS

PDF

44.3 KB Created: 2020-10-11 17:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 08bf4e02316bca5f1ccc630dfc9538cb SHA-1: ede3d9614373196c6ee09783dfff9260344ef860 SHA-256: 4aff1ec14247c9b65327d958b344109e45018ef4c716df288f8ff8d65015f164
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://gettraff.ru/strik?keyword=long+vowels+worksheets In PDF document text
    • https://site-1036627.mozfiles.com/files/1036627/butava.pdfIn PDF document text
    • https://site-1039633.mozfiles.com/files/1039633/xazibe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6852/5210/files/roaming_captains_nessus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/0651/0247/files/70061319536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8026/1025/files/junaduketotar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bbdcf44-4b5a-4d00-998b-eb5b90a8879d/goloropaloroxobefadeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c373f676-7936-4edd-8f1d-2813601fcb65/mojolerofek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b2d999-e99c-44e0-b560-e031514a0af4/puradomojuvoxomep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/344a8c71-46c8-4b95-b717-0bbf7d71a816/40619019410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e53f008-464b-4e57-83aa-3dda2dc3d600/newakekuxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d0ff742-8b4c-4d66-a319-81a40a33c30f/xudikifixataziju.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B3 4632 bytes
SHA-256: 5eaa06f5b6f2c70c8aabfc6d1aa41e7df4749b21b4df1755a99a7cc3390d1d20
font_01_sfnt_off00007182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7182 11032 bytes
SHA-256: 7ad37133ba02d41866f39b52449fa196548dc5167c8aa71fa364a6756965221c
font_02_sfnt_off000096cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96CB 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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