Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfdc96c4b2d0cc3b…

MALICIOUS

PDF

65.8 KB Created: 2020-08-14 00:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a9a95894b6d63dada297dca5b1b4100f SHA-1: 71a4997f172b486d5a1d03e62ee87c110d222650 SHA-256: cfdc96c4b2d0cc3b4c7f5f7f8473789bd0eba37ca85aa087871838e337ce26be
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL that triggers the redirection. The PDF_SEO_LINK_FARM heuristic further suggests a pattern of generating numerous links, likely for SEO poisoning or to distribute malicious content. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF.

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.com/wb?keyword=qualitative%20research%20define%20pdf In PDF document text
    • http://files.teadrunktailor.com/uploads/1/3/1/4/131453206/sakolerojoxuj.pdfIn PDF document text
    • http://files.designsbykneeknee.com/uploads/1/3/2/6/132682076/619012.pdfIn PDF document text
    • http://files.theputneypolestudio.com/uploads/1/3/1/6/131636719/9240263.pdfIn PDF document text
    • http://files.peacememorialauditorium.org/uploads/1/3/1/4/131483148/nigazuzetiruvabu.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/1/0427/8448/9631/files/99106783933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3876/8284/files/avon_catalogue_septembre_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2200/7969/files/82291872545.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75609531209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/juxumadebamapetutorobegew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0039/6956/files/biosensors_in_agriculture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/adaptis_gel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/kijusuzazudugozufezexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3483/7149/files/madugususifowamajununuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3347/3702/files/dell_optiplex_gx620_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3220/7782/files/network_marketing_training.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7271/4920/files/history_of_islam_in_urdu_books_download.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 7

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_off0000c4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AA 5364 bytes
SHA-256: 4e1246d8d1bc9a1aec41c9fbf4c50384358a14e320ab3e88f63cbf4c9a502537
font_01_sfnt_off0000d6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E5 10460 bytes
SHA-256: 22df6cf3ae320ff008e5842bca93374c9e9203800c1125665919a191f2aad11a

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