Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceca15835056d934…

MALICIOUS

PDF

33.8 KB Created: 2020-11-09 14:38:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2ef3f6edbb5c1ab5769a3f8746bfd25e SHA-1: 18c3e0c9dc40f26bbed00d2bc4f84574e43b79a3 SHA-256: ceca15835056d93490b6c3249a8eb4b41fbcd0912795570bc6c8eac6680b1849
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure related to a 'Stoichiometry chapter 12 answer key worksheet' and embeds a URL pointing to a known malicious redirector. This suggests a phishing or malware distribution attempt, likely delivered as a spearphishing attachment. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffine.ru/aws?keyword=stoichiometry+chapter+12+answer+key+worksheet In PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/3623588.pdfIn PDF document text
    • https://wuwenivavubujer.weebly.com/uploads/1/3/1/4/131437756/tedukixi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_5f9d1e7b92ca2.pdfIn PDF document text
    • https://gowokijisamupu.weebly.com/uploads/1/3/4/4/134438950/e796b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445115/normal_5fa7d76d31756.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/english_advanced_vocabulary_structure_practice.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/smart_home_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/tenoxitonipuw/44782558366.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/treatment_for_antisocial_personality_disorder.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/what_area_code_is_336_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/dilajuwomuzogibupom.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/bezepadukatomaxapudu.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_off00004680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4680 5688 bytes
SHA-256: 21d1487406d2f5b9148366c52e8bc3a056a87175b97891b46f5a5d35e6f4e7c0
font_01_sfnt_off000059d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D2 9536 bytes
SHA-256: f8c0770c3693f84e2cae84c84cfcfe5be98ea86b78bfe434ab6596228f25b165

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