Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2dd79e439cc28e…

MALICIOUS

PDF

38.1 KB Created: 2020-10-19 16:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 44ed33c0fe878c23cdfc629cd3adb611 SHA-1: 437479b39ca842bbd44431e0e32b5dca3315d017 SHA-256: af2dd79e439cc28e5bbaa75a862df469991bd8452a2b1e01da7aec0e87b520bd
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.me/123?keyword=passive+voice+tenses+exercise+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f8bd0ee808af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_5f895381d8bcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369935/normal_5f88535265ed6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f8937ae3c667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f885b90847b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f8a555ec34bd.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/b3606d6.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/tadovudumiwebezi.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/kozasoj-gapuro-zuwidaru.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/lupoxisuzodegiseb.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/7b735903-ab3b-4238-b249-8235591239d5/45717394530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad9a555c-4d8b-4795-8b19-2adb6bbccacb/32563141281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6120cbd-19a6-4786-88ba-ce40c57824e6/12350361795.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b9ee016-1af4-4a66-b941-13b0da8f78f1/13506831197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af4ad348-f3a8-4442-92b7-4e6e162c275a/witakigixop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a052a491-9d4a-4781-ba22-0a33d3fea7ac/the_well_of_eternity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c287aef-b7c9-4eca-83f5-febb55991a85/81993443316.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35082fa7-ba9b-4adf-800f-4729cdca5102/57041846521.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6ed4fdc-29b3-4598-b985-39ced83d5b99/76519047583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76953b0e-cacb-471d-973f-7ba8b46145ae/perekumexupowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49718dd0-74e7-44c4-acf5-6effe53605c4/fuvedatiwerej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b1bd864-0aca-460a-a37b-b97a42052f88/34661105803.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_off000056cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56CB 5244 bytes
SHA-256: 551d889e26c1ba89f818c171445a59f7c4385f239bd67dea791eb332ce0cf6eb
font_01_sfnt_off000068b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B3 9900 bytes
SHA-256: 953c281e91557ab431445606caa2ce1ab060a57cd0c5846f0d3ea0ef232f13d7

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