Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cebe008a65e881…

MALICIOUS

PDF

45.4 KB Created: 2020-08-05 04:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 38a7f27bbb70e2fc109caf80a7de00bf SHA-1: bcb6efc2fe8bda9365d1e9b03505657f18fee8d0 SHA-256: 63cebe008a65e881d8a2169782ccb0da358c934814b3371daedbc1ec8205f419
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.cc) known for hosting malicious content. The document body, though heavily obfuscated, contains URLs that are part of a link farm designed to improve search engine ranking for malicious content. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a phishing lure disguised as educational material, leading users to malicious infrastructure.

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=atividades+de+alfabetiza%25C3%25A7%25C3%25A3o+em+pdf In PDF document text
    • http://files.noc1.net/uploads/1/3/1/6/131606289/8e6fbd01ae.pdfIn PDF document text
    • http://files.spanishteachermalaga.com/uploads/1/3/1/4/131406222/rugobawalowu_texelabekev.pdfIn PDF document text
    • http://kovezew.blog.rowlisonart.com/uploads/1/3/1/4/131453177/ec1d2b02ad08.pdfIn PDF document text
    • http://files.vorderosaretrievers.com/uploads/1/3/0/9/130969663/muwuluxazowo.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/1/0433/1975/4907/files/zozowag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8434/8569/files/kinasukewivusurupepegoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9774/2750/files/mefizejifuzabunagetuzuvow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/55310298802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9354/1532/files/96537024591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/research_assistant_job_description.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/leduvaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6756/3429/files/67576425946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/97570437374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7722/1017/files/87325101054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/digimon_world_digivolution_guide.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 2

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_off00006d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D31 5832 bytes
SHA-256: 89813cf5353dc5fa9295e8f913c508df6f71918f36962d1eb93981ad937de342
font_01_sfnt_off00008070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8070 12800 bytes
SHA-256: c65aa27b32b6699c6fe804630e911f0aec3c0d27690df54a66bd5ff1f3ccc0dc

Open this report in the interactive analyzer, or submit your own file for analysis.