Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d829bc3839ca65c…

MALICIOUS

PDF

36.0 KB Created: 2020-10-07 01:33:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-18
MD5: 0e6e4d61d434d4d1e4d863d2c129bc76 SHA-1: 38c5a53774e3164a192d20bb769e421dfe177421 SHA-256: 5d829bc3839ca65c6ead80a3712d183624f68526858ba941dafd17959f8c0f4a
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=hollow+knight+keyboard In PDF document text
    • https://site-1039183.mozfiles.com/files/1039183/buxinuwetikis.pdfIn PDF document text
    • https://site-1037102.mozfiles.com/files/1037102/46565754805.pdfIn PDF document text
    • https://site-1040250.mozfiles.com/files/1040250/birugopasegivil.pdfIn PDF document text
    • https://site-1039783.mozfiles.com/files/1039783/38084759292.pdfIn PDF document text
    • https://site-1039935.mozfiles.com/files/1039935/pigepejijiranepubafig.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/f9830dcc-7a00-47e9-9a71-37baf4285d55/69774936268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1364749-e43f-492b-b78e-ef6e57b63c36/82291729948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6664702-a16f-438d-aa74-437e50654598/68063412122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43f9561e-4963-46a9-a690-0afeafec7fbe/14007173473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b922f530-b18e-43bd-96a5-112139384252/75109461708.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e45853b-63ee-4191-bf94-648c64c1b1c2/gavefilejatamefisajegad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f80c93c-8e4d-4ab1-a0a5-57bab8f1292b/89343294466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b00df7-2a89-48ed-9da0-6a57cf165878/watofejapisawusukedobud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5169/8344/files/como_funciona_el_sistema_solar_y_la_luna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0201/9488/files/college_board_ap_calculus_ab_practice_exam_multiple_choice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/5467/2293/files/cobb_county_arrest_records.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4095/4773/files/manual_for_living_by_epictetus.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_off00004d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D7A 5268 bytes
SHA-256: af29b7213f9a7e028dab5231ec7e3b1e392479ea3bdc340ad417085c26555fb3
font_01_sfnt_off00005f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F75 10528 bytes
SHA-256: 7deae06feb5a1cc0b778a4e5fab343f8f0a3a7a61ebac7c7a5d4ae239a1c1e9f

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