Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe7dec33c1d1a22…

MALICIOUS

PDF

47.8 KB Created: 2020-10-02 06:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-24
MD5: 8b50d9a2b2f5d5f69b7fa0cc84c8c315 SHA-1: 42ae3085502ba677bbff6e78d6317cc3cdb6e4c8 SHA-256: cbe7dec33c1d1a226c1273d918eda3143bb4082cfa0213ef8efdad32471a4759
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://cctraff.ru/strik?keyword=air+pollution+control+textbook+pdf In PDF document text
    • https://site-1038527.mozfiles.com/files/1038527/munim.pdfIn PDF document text
    • https://site-1037003.mozfiles.com/files/1037003/juwibarezuba.pdfIn PDF document text
    • http://files.rccwood.com/uploads/1/3/1/1/131164475/b13a2f.pdfIn PDF document text
    • http://pifig.gogowalkies.co.uk/uploads/1/3/0/9/130969021/6548fc7ff06e1ca.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/8441731307.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007cf8.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007cf8.bin)
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/best_buy_cameras_nikon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9415/5170/files/arbonne_host_rewards_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2089/4886/files/descargar_musica_apk_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1507/7792/files/mbta_greenbush_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/school_counseling_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8990/6852/files/84748404582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9289/3093/files/possessive_nouns_worksheets_2nd_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5371/9453/files/suburban_hot_water_heater_sw6dea_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/3739/4597/files/dosozomoxotuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9419/4843/files/31641648341.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_off00007cf8.bin)

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF8 5020 bytes
SHA-256: e1ef224136683a5105e68a54868cdb03917a7b9fc2e517ae8be6c3f28d2fd8ab
font_01_sfnt_off00008e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E22 10452 bytes
SHA-256: 9f677914925d1a777d7023013f709a55787b28656a820171bcfc674a8fc08ee6

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