Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd51d74109d4e563…

MALICIOUS

PDF

43.7 KB Created: 2020-08-13 08:52:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: deba31d53bfd0a5380db1aa5b93e743d SHA-1: e586a9a4300f860bc39066d3f724592f949ab9e5 SHA-256: cd51d74109d4e563d6592be34e9b44c2f951c7e33acaf1c74b7f70b1cd306598
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text and embedded links suggest a lure related to inserting PDF files into PowerPoint, likely a pretext for SEO manipulation or redirecting users to malicious sites.

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=can%20you%20insert%20a%20pdf%20file%20into%20powerpoint In PDF document text
    • http://rakudogu.colecountygenealogy.com/uploads/1/3/1/3/131379730/ribisipifo.pdfIn PDF document text
    • http://files.kvrclub.com/uploads/1/3/0/7/130775940/jasedotajifu-tupuke-patawuboro.pdfIn PDF document text
    • http://fafozowuk.uccellos.com/uploads/1/3/1/3/131398455/zokifaninogaka.pdfIn PDF document text
    • http://files.scatteredsacred.com/uploads/1/3/1/3/131383931/kuxumoxeme.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/1/0448/6466/7810/files/anlamli_hikayeler.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7522/1144/files/edexcel_igcse_human_biology_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/69314143900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/tiwimanumarajusilumin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6499/9590/files/fobajomof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/factorio_blueprint_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2607/8101/files/bovogidojowirasujukisol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/44752318650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3506/4480/files/bases_of_market_segmentation_with_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/zeniked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/ramadan_calendar_2020_dubai.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2484/2906/files/96792295945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3134/7868/files/vujevitotojifokumilese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/8782434951.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_off00006cb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB1 5136 bytes
SHA-256: 95cbc53ec400a92b6ecf0418ff32ab314aaa905e5b989d4582d7c41f1f3f9224
font_01_sfnt_off00007e52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E52 10128 bytes
SHA-256: 48307f4fedd7f5d061f8dada99d60cc94968e9b073810661f0b8fbd0f00f0c2f

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