Malicious PDF — malware analysis report

Static analysis result for SHA-256 453b40235acc5f7a…

MALICIOUS

PDF

53.8 KB Created: 2020-08-20 19:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3c84fb83220e8667e20fcf93ae0d0138 SHA-1: ad3b9384619765da37ce25698a970d293e834b57 SHA-256: 453b40235acc5f7ab5ffd86f8b7bd599ef4e239425643c794f28e866345a7d9b
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The PDF also exhibits characteristics of a link farm, suggesting an attempt to distribute traffic to various external resources. The document body, though partially corrupted, contains a string that appears to be a keyword for a search, further supporting the lure aspect.

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/pify?keyword=cours+atomistique+en+arabe+pdf In PDF document text
    • http://tufaru.wendyjfox.com/uploads/1/3/1/3/131398455/8203825.pdfIn PDF document text
    • http://senija.shannontkd.com/uploads/1/3/1/4/131406149/limibesiponug.pdfIn PDF document text
    • http://wopumese.entreprenora.co.uk/uploads/1/3/2/6/132681946/semonuko.pdfIn PDF document text
    • http://vaxusukew.lavarsteelart.com/uploads/1/3/1/1/131164392/2402901.pdfIn PDF document text
    • http://files.a-custom-esl-tutoring.com/uploads/1/3/0/7/130775265/zirugowub.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/1/0430/7664/9121/files/gedan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2904/4119/files/mutodaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6241/files/7919924137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9773/5843/files/861852144.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65107231385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/rurobabama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2751/0934/files/28109410648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/14501237232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/82533252888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2589/0466/files/87074044010.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 1

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_off00008f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F80 5328 bytes
SHA-256: 26fac9bc430e69df89add70f2daf3ea4e2bc48e1f22d19993d35ed300c3c1be2
font_01_sfnt_off0000a179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA179 12336 bytes
SHA-256: 9c279ec583a6cdfc285af134a38a80386eaf658d36d07eec967ac6b653dcd101

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