Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6cd8793acae208b…

MALICIOUS

PDF

35.9 KB Created: 2020-08-13 11:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9b059f81daf2928235c156b38ed0bfe3 SHA-1: f51fcf0b530c7207e2950a118b1803f9cf1ec710 SHA-256: f6cd8793acae208b73168c60e958d8a764acede98afb98eb968aa7256de8aea2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which are SEO-optimized and point to benign Shopify domains, but one critical link redirects to the known malicious domain ttraff.ru. This suggests a link farm or SEO poisoning technique to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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.ru/wb?keyword=rational%20exponents%20grade%2011%20pdf In PDF document text
    • http://files.birthcaremidwives.com/uploads/1/3/1/0/131070597/vekukij_fupatadeka.pdfIn PDF document text
    • http://jorakuje.mellowinthemeadow.co.uk/uploads/1/3/0/8/130874457/fipuluvugevabo-samitir-pogemot-nozubud.pdfIn PDF document text
    • http://files.rayofaura.com/uploads/1/3/1/8/131856446/fejukanefo_kesotokefet.pdfIn PDF document text
    • http://balidi.windowsofhopeintl.org/uploads/1/3/2/7/132710712/ruginedolisuzeforu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/introduction_to_manufacturing_processes_groover.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1508/9825/files/70571055372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6823/3630/files/welokefefuzanumusejujada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2454/6972/files/65521307215.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/dudirabulid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/png_interlaced_what_does_that_mean.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4437/1613/files/19461873180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0689/2960/files/wakotixino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9586/8057/files/65594708452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2794/6904/files/kugefikidakatojaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/5742617786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3579/4340/files/30978160388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7414/1864/files/ruwaxosekoda.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

Related samples 4

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_off00004da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA6 5336 bytes
SHA-256: b0539e0f0978c452505e36678200c709eb808c2a5242eb189c54f46ca824ea2c
font_01_sfnt_off00005fed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FED 10688 bytes
SHA-256: 9865549ebc07983489e53e8a52f24f84848ae9715e0550b50dbbfcf2564a91f7

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