Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea95ec48e6570ed8…

MALICIOUS

PDF

49.8 KB Created: 2020-08-31 12:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4bf7743193987d9eda0b08bdff301f42 SHA-1: e47e48bc023c4694e5dc851bee67ddd4d72933e8 SHA-256: ea95ec48e6570ed8b9e3a04cebdfc15e2534062f1861c523d1d77f0c9bfa0500
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to benign resources, but one critical link directs to a known malicious redirector at 'https://ttraff.ru/wix?keyword=reading+strategies+for+high+school+students+pdf'. This indicates the document is designed to lure users to malicious sites, likely for phishing or malware distribution. The presence of a link farm heuristic further supports this malicious intent.

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/wix?keyword=reading+strategies+for+high+school+students+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1f2190803f6a4aa79018dbb087649e63.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_61a8fd9d557f4068bb5e783080b20db6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7ff653_e6d21964bb0f4b36a7e101e5e65aa5cd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0e2875_9cba4e62d21b475faa6177d7cc74aa19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6946/4991/files/chemistry_central_science_13th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/lariparurowexukal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5925/6232/files/5550784320.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/21e6f2_6f426e3db1de40e1945481b4fa4f35f3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7c129ede45344c8f9c428e1332799957.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0049ca_9e36b901382a403e98e6583dd26ed217.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1516538660044be79637c72da6bec997.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_off00008582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8582 5424 bytes
SHA-256: a1b3eda017209baeab5489008556ca13907cd5fee426da5ed13e404bf7e81bef
font_01_sfnt_off00009800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9800 10120 bytes
SHA-256: f8feb01c51b00e0fde95b06ff6c2ee65f4486c68e82a5c94bf32fab1a8b94669

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