Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b27515e4ce89824…

MALICIOUS

PDF

42.6 KB Created: 2020-09-12 11:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8c3996553837ad47e55fa3e191f17e2b SHA-1: dd2fd60f2059fade7ce9da7c0e1af5ad7d7caf3c SHA-256: 4b27515e4ce898242c3afc59bc50d6c92f1dcf29687685eeaac9999f5d32e1f8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains a link farm and a critical heuristic firing for a malicious redirector. The embedded document body text, though corrupted, contains fragments of URLs and keywords related to downloading Windows 8, suggesting a lure. The primary malicious URL identified is https://ttraff.me/wix?keyword=windows+8+64+bit+torent+iso, which is likely used to redirect the user to further malicious content.

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.me/wix?keyword=windows+8+64+bit+torent+iso In PDF document text
    • http://files.zavoralab.com/uploads/1/3/1/4/131406811/nubigagitemivepiwo.pdfIn PDF document text
    • http://files.designsbyjakej.com/uploads/1/3/0/7/130739204/gokadez.pdfIn PDF document text
    • http://files.naturegreenleafllc.com/uploads/1/3/1/4/131454049/8699274.pdfIn PDF document text
    • http://kobuwagit.thesourcemassage.com/uploads/1/3/2/6/132695278/difetulereke.pdfIn 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/edb4a7_f195c56d24794a01b7a716c866b3d23c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e3ed1f_132e6d88f14b4692a7b0f7a5e0d1a83f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6290de_e5144811a71c4e469c2dc98f09b6df5d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b3bc21_ab2b6447c7c9439abac501168d846fef.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/38bf1f_5546fb1691b64156bdd1ce649dd2ac56.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_97576efa759d4dea8604a39c453731cc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cec570_aef7065b45c34ee094fab144416f6430.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/739437_c5c27e777b35413d88527dde33362f2d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4568/2332/files/cuneiform_random_facts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/podazifusixaxoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/copyright_mcdougal_littell_inc_answers.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 3

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_off00006997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6997 5260 bytes
SHA-256: 4dc26dfd08034b1aeb1d97a532a50320e7cf7fa0611493d212146dd895dc1021
font_01_sfnt_off00007ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA3 9896 bytes
SHA-256: fd9205315b98c0db457196425cd16740a65ebfaebfd15fd23827faa450b0ec48

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