Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a50d1282defdfa…

MALICIOUS

PDF

48.5 KB Created: 2020-07-27 21:58:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6b0a960498ac98c5a9c8742a5791b8a2 SHA-1: 00d10858aab602bc85a00e5f4106441677cd5b6c SHA-256: a7a50d1282defdfad6a8d7375f1cd17b5fb02b2a042ab9925b31a5521bb9cde8
194 Risk Score

Malware Insights

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

The PDF file contains a link disguised as an admission list, which redirects to a malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this redirection to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, suggesting a spam or phishing campaign.

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.cc/pify?keyword=oou+admission+list+2019%252F+20+pdf In PDF document text
    • http://files.medicinalrootsmagazine.com/uploads/1/3/2/6/132695339/726c76.pdfIn PDF document text
    • http://files.solutionstailored.com/uploads/1/3/1/4/131453712/2607489.pdfIn PDF document text
    • http://files.widuskorea.com/uploads/1/3/1/8/131872055/7564274.pdfIn PDF document text
    • http://files.dsnatural.com/uploads/1/3/1/4/131408170/rojovupajagigogis.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/1/0431/7901/6360/files/zixamasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9003/5366/files/vulirinoxizadaranitaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/19859679841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/roted.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/19760365732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/gejimolasiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/70093200564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/2420522867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/dubuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7757/4551/files/34919679640.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8206/3777/files/sijavatev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0228/8537/files/vexevavide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7181/3285/files/43278079978.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 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_off000075bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75BC 5400 bytes
SHA-256: 77c9b0c20757b02f3fe2f57c40ba49cf9d4c287a2fbb47ba1878859f08bdadef
font_01_sfnt_off00008805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8805 14364 bytes
SHA-256: eb21032e293a633ca8f6b0046d13a6e40be7e062a4aadc6f78abd43e8cfd54c1

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