Malicious PDF — malware analysis report

Static analysis result for SHA-256 751879e028ecfc82…

MALICIOUS

PDF

38.9 KB Created: 2020-09-13 06:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 25efe5e4c4e3d74df5b1ab9d92034f7b SHA-1: 60eaae6889effe1ea0e427df16e697a5edb34fe9 SHA-256: 751879e028ecfc8200ecc29d2f21a564547a5acc60049dd9a8cb27fcb8ffa5aa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service, indicating a link farm or phishing lure. The primary redirector URL is associated with malicious activity, suggesting an attempt to trick users into downloading further content or visiting malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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=go+math+grade+5+teacher+edition In PDF document text
    • http://rowak.ldk-art.com/uploads/1/3/1/3/131398140/rilanup.pdfIn PDF document text
    • http://fajarula.sossanantonio.org/uploads/1/3/1/3/131398591/xemewevimizunuposo.pdfIn PDF document text
    • http://files.wilsonfeed.com/uploads/1/3/2/6/132695575/bilam.pdfIn PDF document text
    • http://lisajexu.0frenchpolishing.com/uploads/1/3/1/1/131164173/86e9b5914dbd2.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/1/0431/3323/9457/files/employment_news_14_september_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9114/0510/files/16682509155.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8596/9048/files/63010247676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/57353587459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/xigajupuzuduvisivoxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5926/3128/files/how_to_download_off_lovers_lab_for_sims_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3103/6053/files/electricity_generating_authority_of_thailand_annual_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4071/9516/files/gosukovosebobakuxapejuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/mazewatifurixovexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/23583362425.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_off000058d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58D3 5300 bytes
SHA-256: c81b97c918d565c61037e2adadd6a0c84c8149283b4004e265f87ea3deeccc7f
font_01_sfnt_off00006aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAF 10444 bytes
SHA-256: 704cb4b02af5537c11fc27bfc560bd1bfcde2eea77efaf8ac0c52876cf8cb99e

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