Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd718421ed1df2b5…

MALICIOUS

PDF

47.0 KB Created: 2020-10-17 00:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: f467dc99f7df6688d71c8c6602b27ebc SHA-1: 169a66cd3582e8b4f0e44e5e3bce3ad7c7542906 SHA-256: cd718421ed1df2b525fbf1300d70239bc89fcdcdd6656e593de270445dee1898
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://ttraff.com/123?keyword=jet+propulsion+pdf+nptel In PDF document text
    • https://namunobuwuper.weebly.com/uploads/1/3/0/7/130776476/2861442.pdfIn PDF document text
    • https://pedegafulip.weebly.com/uploads/1/3/0/9/130969407/e077f914d66bc31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/25ba4649-f07b-48f4-b5ff-94ecba2efaac/mukasovefojebakir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1492b84-53c8-4cc1-9e2a-64dd11af0a8c/67509503930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f1dd5c-3559-4302-814d-5f190b541fab/89724826427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/073a05b7-70df-4f1d-819a-651dd7014529/wupeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa40d083-412e-4647-992e-3e39bb8959af/44131873250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6551e34d-315c-4d76-9700-5d3344f8aa02/tisafovewusupi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7503987-3885-457e-a750-5a09969823a7/dadave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/079592eb-4ca5-4d3e-af46-3b8cfa80458c/32628579437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9225/5921/files/augment_ancient_item_diablo_3_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1147/3059/files/want_mature_dating_site_reviews.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7197/7640/files/wedirediponegodude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9795/5745/files/los_olvidados_buuel_filmaffinity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3808/8609/files/gatebesixiratewawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5901/4551/files/nation-state_law_israel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b7180ab-3ff3-4b8f-b285-29372efb7dd6/godukukuxomofepazuwoxoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98346b93-148a-4c74-88e8-b2fbddeba50b/kazisofesometiredodal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42cc2356-64f7-4b14-9499-e05fc915b7aa/gumize.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_off00006fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDE 4816 bytes
SHA-256: 483e769ca91bb937f34174b8482d6fcb85b483f238ae07f210ed849a0953a428
font_01_sfnt_off0000804e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x804E 15152 bytes
SHA-256: 0d6c3e0ea6d21643a19ba9f310c79d7aaffc80243add287bac2b0e7e33f9211d

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