Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4a85455f2c385a…

MALICIOUS

PDF

48.4 KB Created: 2020-10-27 03:49:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-03
MD5: d582682f4c94a256fde03ece3a125469 SHA-1: f5c58e2504710057866d35e629ed4b608951cfc5 SHA-256: de4a85455f2c385ae61bf13ac4a7c266c22ca96bea20e2624e701f5095755ee8
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/wb?keyword=clock%20aptitude%20tricks%20pdf In PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/1270511.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/2313c5c.pdfIn PDF document text
    • https://pusojavinobaz.weebly.com/uploads/1/3/4/3/134353251/447d0.pdfIn PDF document text
    • https://bujupovira.weebly.com/uploads/1/3/4/4/134472582/baa642a00.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/andhra_pradesh_cabinet_ministers_list_2019_download.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/as_3500.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/botany_obe_syllabus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8700fa7871a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f8fceec9f77e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388833/normal_5f90e8c593a1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_5f976276db532.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007f48.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007f48.bin)
    • https://uploads.strikinglycdn.com/files/4b771dd6-ddcc-4d6d-8bd8-ced0c2afc5ad/wadanixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48c20829-858a-4195-8bcf-0b2b061dda4a/94631357916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e32fa89-d98f-4dfc-a296-4a11632f744b/kubajipidunixizemuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87615842-490f-4dac-8942-1668d918f018/gizaluzoxunapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f60844-8766-4fdf-8985-4d426e2c4a32/kamil_krkolu_hatralar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab760655-8a58-4e05-be11-02560f6a2d58/20756211213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15be380f-47cb-4874-be7d-12a530a05160/life_of_brian_free_full_movie_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af26bda-c2cb-4f40-8efa-ec7a2cacd165/glencoe_mcgraw_hill_new_york_geometry_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8d3916-fcbe-4320-ae18-af1a41823bca/hur_mycket_kostar_combigan.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 extracted file (font_00_sfnt_off00007f48.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F48 5120 bytes
SHA-256: 5caf9bc61142206ea4cefe299d7d75c22e12306b8edd5e6555c87738fb8e45f3
font_01_sfnt_off000090ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90BA 10588 bytes
SHA-256: 6174ec9186fa401abf68e1256cc821768c53f5948a3a909b3e57cb0428959623