Malicious PDF — malware analysis report

Static analysis result for SHA-256 42559961f5f7bd93…

MALICIOUS

PDF

39.3 KB Created: 2020-10-05 22:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-15
MD5: 86a746e327e31db5fd81bd91e4de691e SHA-1: 1154e360574ddbc5743b4ccfb4dc1c92d90eb53c SHA-256: 42559961f5f7bd932b2696562a93aa08b082e2b55cf3baddf7ddf43847e8bbc3
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://ggtraff.ru/strik?keyword=essentials+of+psychology+concepts+an In PDF document text
    • https://site-1037843.mozfiles.com/files/1037843/7195043157.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8503/6706/files/macbeth_study_guide_act_1_scene_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/4784/7589/files/audio_fx_apk_android_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3174/3648/files/timex_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7171/5993/files/mhw_research_ticket.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9335/5416/files/dover_childrens_museum_coupons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7623/9014/files/samsung_manual_defrost.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7423/9129/files/dewalt_fast_charger_4_port.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3437/9941/files/46066864740.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1127/1588/files/34189560921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7555/7793/files/32979235251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5973/5447/files/vatuka.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_off0000523f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x523F 5240 bytes
SHA-256: 090d42e1c7bce70b32861723531a72104635f5c6660cdfe15d0f473c5be528e4
font_01_sfnt_off00006428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6428 14152 bytes
SHA-256: 6971519ee974d26e7e9e4935402426a9524b4c8ee5501476ef5dc1cce16b1a16