Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fdb4a6c3ab17acc…

MALICIOUS

PDF

40.2 KB Created: 2020-08-19 08:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 716e98d0daf28f9b080f6a9f2c416ade SHA-1: 2d2d7c4124d332d54c5f1ae82cb3335b6666020f SHA-256: 5fdb4a6c3ab17acc93c713dfc8af9045a42fd6860c0caf6d2378d7b513a660e9
194 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links designed to redirect users to external websites, masquerading as exercise materials. The primary redirector URL, https://ttraff.com/pify?keyword=br%25C3%25BCche+%25C3%25BCbungsaufgaben+pdf, is flagged as malicious and part of a link farm. The document body, though heavily obfuscated, contains references to the redirector URL, suggesting an attempt to trick users into downloading further malicious content or visiting phishing sites. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly indicate a phishing or content-luring attack.

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.com/pify?keyword=br%25C3%25BCche+%25C3%25BCbungsaufgaben+pdf In PDF document text
    • http://files.yogawithminta.com/uploads/1/3/2/7/132710748/2190998.pdfIn PDF document text
    • http://muvaxiji.aasvehiclesolutions.co.uk/uploads/1/3/1/3/131398101/a7d1d5be51631aa.pdfIn PDF document text
    • http://xuduvano.travelmittelamerika.com/uploads/1/3/1/3/131380429/gumamudebupaxuwevewi.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/1/0433/0687/7080/files/34007792176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/wefugasolinedaraf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/popunuzajifireluvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0258/3449/files/sobupowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/22572985134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/woxopuwibokedekas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9234/8838/files/51176430232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1458/6521/files/81833822615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8116/3157/files/xejebikuzutudukoxevemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/child_development_a_thematic_approach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6314/8695/files/vonuvefapifepesabonopesa.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_off00005b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7D 5692 bytes
SHA-256: 53de51760a859cbd3752e589f8cf5d1c5e67f0e1c5703726eb6faab944271108
font_01_sfnt_off00006e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9F 10876 bytes
SHA-256: eb107eb24a6e5301d769882764a71dbce6d1b722391d7a1ba666fd9f1c2b28ab

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