Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8f2d37148f60de…

MALICIOUS

PDF

59.6 KB Created: 2020-10-03 19:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: ee919c0e989cf265325a2756adc92ffa SHA-1: bdede5c5a40f0bb71913622d1d4d372ba0ae6cca SHA-256: cb8f2d37148f60de64642bdce16225359ba35ccd839cf40245441c953d6abf8f
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=psychology+11th+edition+carole+wade+pdf In PDF document text
    • http://files.bountifulpies.com/uploads/1/3/0/8/130814355/8685729.pdfIn PDF document text
    • http://genep.madisoncountycc.com/uploads/1/3/1/8/131871787/fubafij_pemakugamegoz_besezi_xadufejanu.pdfIn PDF document text
    • http://laxizarin.stampedeclub.org/uploads/1/3/1/8/131856959/lonesulijimef.pdfIn PDF document text
    • http://rovujo.mysje.org/uploads/1/3/2/7/132740267/biguwokep.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000a8f5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000a8f5.bin)
    • https://cdn.shopify.com/s/files/1/0469/0067/4720/files/estimate_sums_and_differences_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1127/1588/files/vurajosoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5555/4455/files/white_blood_cell_animal_or_plant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d681c546-a943-4e25-b988-f3643e0d1e1c/kineliguw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a51aa7-d050-44b6-8663-9560c089d102/37094052530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd82b47-7f2a-42a1-9391-d2314c12aac7/rajatevapawapuzazixor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e3ea27f-2001-48dd-9d5a-8c1cf0a25274/lasidoxuwob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17cca084-e86e-4e90-9b34-54a296ca1d92/pixak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a69e2af1-a453-48c8-a4ab-656960d58a31/91440297746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f16ae191-e943-4380-84cb-43d3084c7f63/53389226483.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_off0000a8f5.bin)

Related samples 8

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_off0000a8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F5 5664 bytes
SHA-256: b8e79cabeeed830fe963fe39bcd8b48a038f0ab8242e9b3e42c8067cb5f5b75c
font_01_sfnt_off0000bc55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC55 10832 bytes
SHA-256: b2fa7f3abe7ed5b6672c4b8d7a9eae0882d8996e1b309c234808facd20013e01

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