Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffffcf1f5be90832…

MALICIOUS

PDF

50.5 KB Created: 2020-09-17 08:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8361f25625a735de34ae57f40ee62f8 SHA-1: 91262cdbd045dcf929c255d8730223aafc451df6 SHA-256: ffffcf1f5be908329f12f410d2ddb770aa5a8394c4e4a4e872324e255b1aa489
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple external links, with one specifically identified as a malicious redirector. The document body and embedded links suggest a lure to download a file, likely to initiate a further stage of infection. The heuristic firings strongly indicate malicious redirection and a link farm designed for SEO manipulation to attract victims. No scripts were extracted, but the presence of numerous unknown URLs points to a downloader or redirector pattern.

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.link/wix?keyword=ca+quebec+driver+manual+fr.pdf In PDF document text
    • http://files.hannah-harding.com/uploads/1/3/1/8/131856119/zukubafe-rorumopiruxemaw.pdfIn PDF document text
    • http://files.merarifernandez.com/uploads/1/3/1/4/131407165/6839308.pdfIn PDF document text
    • http://files.cavalierbattalion.com/uploads/1/3/1/6/131606563/budozasi.pdfIn PDF document text
    • http://fikob.stoneycreeklabradors.com/uploads/1/3/1/0/131070420/pirebigudon.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/1/0438/4774/5698/files/adding_dissimilar_fractions_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7673/8462/files/13987035884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/3164/3558/files/basketball_wallpapers_hd_for_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1035/8423/files/55632168741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1760/1181/files/82032152328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/airplay_ed_netflix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7738/5892/files/burmese_script.pdfIn PDF document text
    • https://3a434b47-dd93-4176-acee-22fcf1ba2ab0.filesusr.com/ugd/7603ae_5e6d8e31ccd64a5d9adeba64900f2aea.pdf?index=trueIn PDF document text
    • https://39bbb6e9-4b6a-47cc-aee5-5c0da1402d5a.filesusr.com/ugd/067ecb_37c6f4e1bd45440d8c9573fcd5504363.pdf?index=trueIn 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 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_off00008668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8668 5384 bytes
SHA-256: cdd55df6c9aaf36e2328068b68ad864a2495d2f274a391fc19bec4d502c21c0f
font_01_sfnt_off0000989f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x989F 10752 bytes
SHA-256: e27d4b41fb0f43e5a151596276a476407a6bb36b0eb49e37c8b6a7a55e61588c

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