Malicious PDF — malware analysis report

Static analysis result for SHA-256 445d65606d145829…

MALICIOUS

PDF

39.7 KB Created: 2020-10-05 04:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-07
MD5: bce3e57b0d9a7b39ee202b83cebcd08f SHA-1: 2b303e21bdf0db7f7b565566aee708802904c5ab SHA-256: 445d65606d14582932c077b29ffc1a144e998c3f498ff15ebd8dcbdd502e734a
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=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D0%25BF%25D0%25B5%25D1%2581%25D0%25BD%25D1%258E+%25D0%25B8%25D0%25B7+%25D1%2584%25D0%25B8%25D0%25BB%25D1%258C%25D0%25BC%25D0%25B0+%25D0%25BA%25D1%2580%25D0%25B5%25D1%2581%25D1%2582%25D0%25BD%25D1%258B%25D0%25B9+%25D0%25BE%25D1%2582%25D0%25B5 In PDF document text
    • https://site-1038494.mozfiles.com/files/1038494/makobofonuta.pdfIn PDF document text
    • https://site-1038924.mozfiles.com/files/1038924/kegikiviron.pdfIn PDF document text
    • https://site-1036636.mozfiles.com/files/1036636/rinibegajigokagipobab.pdfIn PDF document text
    • https://site-1036743.mozfiles.com/files/1036743/janomodu.pdfIn PDF document text
    • https://site-1037142.mozfiles.com/files/1037142/57622816395.pdfIn PDF document text
    • https://site-1044474.mozfiles.com/files/1044474/86829845754.pdfIn PDF document text
    • https://site-1036951.mozfiles.com/files/1036951/9533888257.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/26297100290.pdfIn PDF document text
    • https://site-1039129.mozfiles.com/files/1039129/66266603997.pdfIn PDF document text
    • https://cctraff.ru/strik?keyword=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D0%25BF%25D0%25B5%25D1%2581%25D0%25BD%25D1%258E+%25D0%25B8%25D0%25B7+%25D1%2584%25D0%25B8%25D0%25BB%25D1%258C%25D0%25BC%25D0%25B0+%25D0%25BA%25D1%2580%25D0%25B5%25D1%2581%25D1%2582%25D0%25BD%25In 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/1/0493/1403/7919/files/arduino_programming_lessons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3703/8491/files/minecraft_wiki_commands_weather.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9635/0626/files/civil_engg_formula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0303/9903/files/81551935364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0321/5778/files/stoichiometry_worksheet_1_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5135/9642/files/python_gtk_example_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/8599/6450/files/vixifebukomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/hornady_147_6.5_creedmoor_load_data.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_off00004ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CE5 6280 bytes
SHA-256: e5f7fab26f8be6fa2fb2744ff208aa6ffabdb692511b7b7afca23a4d99d586a5
font_01_sfnt_off00006118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6118 14892 bytes
SHA-256: 4ff45368df19c0030bf8a0f038175060c91285c45a8bc8d11cb8e45e55961cfb

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