Malicious PDF — malware analysis report

Static analysis result for SHA-256 276564e1423ef9c6…

MALICIOUS

PDF

45.3 KB Created: 2020-09-13 06:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4110d33a058134f7df2b1443c3482260 SHA-1: 02a981b372e1621ec69ae937cb28347d1ad0c21b SHA-256: 276564e1423ef9c61a67e40079f22d83eee37646677a4cee4982e1f4fad91c73
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. The document body, though heavily obfuscated, contains references to 'neurons worksheet answers' and includes URLs that are likely part of a scheme to drive traffic to malicious sites. The primary attack pattern involves luring users through deceptive links, potentially leading to further compromise.

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.club/pify?keyword=neurons+worksheet+answers In PDF document text
    • http://berajod.knightsautowash.com/uploads/1/3/1/4/131453194/3601296.pdfIn PDF document text
    • http://riluli.justinhoughton.com/uploads/1/3/2/6/132696021/abe9076c5.pdfIn PDF document text
    • http://gijerat.alpacacentral.ca/uploads/1/3/1/4/131408024/684df4034b.pdfIn PDF document text
    • http://files.hometoaz.com/uploads/1/3/1/6/131606605/xatuvagakenuliwuwum.pdfIn PDF document text
    • http://wotenulug.placercountyreviewagency.com/uploads/1/3/1/6/131636733/jiruxus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2926/5564/files/agricultural_systems_of_the_world.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/bayesian_inference_introduction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1806/7876/files/56537362657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4977/0395/files/51410050080.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1e32c2_ada7afdddbe34f9ba93a9f7fdd9fb83b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0d018b_57c79599b79b4eec909f0e9f9ff35b99.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9edd50_d643aeb827c4453aae78b8b7274729d1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b148e5_9bae678335f946ac82e3426208478115.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0dcf4b_76fa70e566aa42eb954c99146494e770.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9cb927_943475930c2e4507868438b70af7a045.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6688 4700 bytes
SHA-256: 5c9af5c3cbf57e52278afe8a35d19166debd27dff367929015419fa9188282ca
font_01_sfnt_off00007685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7685 10476 bytes
SHA-256: b83d3e297e5ab47a4a40ecd59468ed35cd77b2b72d21e82ae15dcbb869d11945
font_02_sfnt_off00009a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A62 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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