Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bd3d3b2af1818a…

MALICIOUS

PDF

30.7 KB Created: 2020-10-31 01:27:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-06
MD5: 9a96800655665a7b9e2a510e0408dc5a SHA-1: 5737673dfd2bf2eb67f614f4e2fd848ecb8554ba SHA-256: a8bd3d3b2af1818a06e61dd2f68ce44eac931a10c202cc1c94adac3e1694080c
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/wb?keyword=esl%20bogglesworld%20summer%20worksheets In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391317/normal_5f9a0dd24483a.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/28943491495.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/17044625536.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/ranododanewan.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/jujagozuj.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/19924060786.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/birajilaje.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/8823881364.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/french_revolution_history_channel_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/astm_a530_espaol.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00003e01.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00003e01.bin)
    • https://cdn.shopify.com/s/files/1/0502/3822/6616/files/27499274988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2929/7817/files/kuxuzirolekuriz.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_off00003e01.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E01 5284 bytes
SHA-256: 326ffcb3c2aad9651743239e58b8d2f710fbd267624935a1a99b326ec51d4805
font_01_sfnt_off00004fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FDB 9016 bytes
SHA-256: 2a8881f7bd3cfe39e8beb3b27553dc28d2390ff556118636465fb878dfa31b04