Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f926681c96617e…

MALICIOUS

PDF

79.1 KB Created: 2020-10-25 17:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-07-01
MD5: 3d360a97fd30fefcc2431936836ba62d SHA-1: cb5d537632fd2f9e977d3028e61ec537a896e480 SHA-256: a4f926681c96617ecea6ef0ce711610a696c32f19af0758b61e432eaa0b8f3d7
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=samsung+ce0168+manual In PDF document text
    • https://baletepo.weebly.com/uploads/1/3/0/7/130776023/48f855e628.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/xojotupexo_venoxixipup.pdfIn PDF document text
    • https://fozokixudaxo.weebly.com/uploads/1/3/4/3/134355354/120605418c82.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_01_sfnt_off0000f087.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_01_sfnt_off0000f087.bin)
    • https://uploads.strikinglycdn.com/files/76e37d9b-66b9-4667-88b2-d2f54346f731/52254707580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e2daad8-d6e2-42f7-9cb3-adf7bccebfeb/63577411017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c5163ea-4452-4fc9-b61c-7e4af34de161/youtube_dntrc_mp4_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6311d44-883c-47f0-8d6d-64c9c4c71e51/kurela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4217/4618/files/the_middle_ages_knight_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/fazusirusajisalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7001/9994/files/94316614404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1155/3473/files/paylocity_web_pay_login_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4818/8104/files/nikon_capture_nx-d_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3730/7292/files/clinical_and_counselling_psychology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2410/5115/files/non_verbal_communication_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2969/5134/files/garmin_basecamp_android_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/vefefevizesedavogigolofib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dea997b-4fcb-4c5e-bfdf-de647f5a5fd4/46110998671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df8a9c13-8672-4578-b157-bfc0fbf26078/vujed.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_01_sfnt_off0000f087.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73F 7772 bytes
SHA-256: e33d05ce289846493f902ea9ab421aa1cf8d1d2a59e57109e063c5500878ac7b
font_01_sfnt_off0000f087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF087 5668 bytes
SHA-256: a082164c2a35dcdc8999b1958015587e5d83f4d7bf7ac2aa79149355db0956ba
font_02_sfnt_off000103b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B2 12840 bytes
SHA-256: f262e5b2365ed789ca3e0a3a79d637caa6ba56171d412755c8790f61f030946f

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