Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63b8c66baac844d…

MALICIOUS

PDF

32.4 KB Created: 2020-08-02 18:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eb634a2e8dac20e0d9e8f18a68be61b2 SHA-1: d94e89d866c261477c181af91819982d10981887 SHA-256: b63b8c66baac844d27de8712e643f0bb7ba3821d177d186765c55ee68afe405a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at https://ttraff.ru/pify?keyword=envision+math+4th+grade. This indicates the document is designed to redirect users to malicious infrastructure. The presence of a link farm heuristic further supports the malicious intent of distributing links. No scripts were extracted from this sample, limiting the analysis of its direct execution behavior.

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.ru/pify?keyword=envision+math+4th+grade In PDF document text
    • http://files.kerishea.com/uploads/1/3/2/6/132682913/bovazari_lesifavab.pdfIn PDF document text
    • http://files.wentworthfallsgardenclub.com/uploads/1/3/0/9/130969458/gedolakefosemutafem.pdfIn PDF document text
    • http://files.klarahomes.co.uk/uploads/1/3/1/6/131607075/32461b1e1c4fd0.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/1/0434/4581/3413/files/petovigozebif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6133/0591/files/96128110122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/pekonolejova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6153/3085/files/47547061010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/20424522606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3066/5637/files/22374320812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3525/5203/files/55610507944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/muxamenudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/17589396599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/97276503277.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7728/6565/files/rugebunopanejis.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_off000042da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42DA 5312 bytes
SHA-256: bf5186cee309a62545a11606e6f6d2bf14fba4c129ddddd54f3b72c64303976f
font_01_sfnt_off000054cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54CC 9456 bytes
SHA-256: 265a34d8b659d776c4404310f63c6c2d225bf292f0d17b33b2e649e855fa5fe4

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