Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd729b9530923d4b…

MALICIOUS

PDF

46.9 KB Created: 2020-10-10 22:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-18
MD5: 351a0e59b42e2ed016b15a5818d55da9 SHA-1: 1ead222d38aa27633aa341fbfad77e5153974dfb SHA-256: cd729b9530923d4b7a2cb61f41efdedab75bbe53c9805e7676fb539612ea3803
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/strik?keyword=free+parts+of+speech+worksheets+5th+grade In PDF document text
    • https://site-1037028.mozfiles.com/files/1037028/16675849286.pdfIn PDF document text
    • https://site-1043446.mozfiles.com/files/1043446/68438453358.pdfIn PDF document text
    • https://site-1040200.mozfiles.com/files/1040200/taxesematebokinoniditoz.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/1/0432/4301/2256/files/northwood_school_nh_website.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5430/0312/files/84858980322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3783/7470/files/read_heir_of_fire_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4944/6307/files/red_sox_calendars.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0022642-c230-4caf-9853-a6145ce356c5/32611534764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7945f65-f942-45e0-bce0-1ac2cf2d2172/53041713898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab62a678-48df-45b9-9773-242a19044af3/3790667325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356ce318-8377-48dd-8303-cbb66292c430/5181432624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ea221a8-0190-4cbd-be2b-8963e688db9d/61597626811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d41ce9ae-8e5a-4bfe-9951-d1a4bc9364f8/7998375528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44df978f-c2d2-4b59-bea6-8c19364798f1/65241894949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3869ee0-2789-4543-a510-30934020246e/rubirofopeweves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24846e9b-7089-478f-933b-7da850a653c9/57738080437.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_off00007771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7771 5620 bytes
SHA-256: 2d420c849394759d10abf09c7d6e04fe5bf01a23daceed629b669f2bad5659b2
font_01_sfnt_off00008aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA2 10540 bytes
SHA-256: 5e6119d85404742468c7eda745d12937c5d162fef03cdf24bb5380a056bdf236

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