Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b27e541da66ba2…

MALICIOUS

PDF

35.5 KB Created: 2020-09-17 16:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 851c02d74c6f1a75ac4187279048639c SHA-1: 68845c15cd5fdb18f00af643c015a04a3384c8d5 SHA-256: b9b27e541da66ba20a3c191ef20091b0574d92d1c63ed62abccf9610222f6a92
184 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.me/wix?keyword=newberry+math+and+science+academy+rating'. The document body, though heavily obfuscated, contains text related to an academy rating and the authoring application 'wkhtmltopdf', suggesting a lure. The presence of numerous PDF links, many pointing to suspicious domains, indicates a link farm designed to distribute malicious content or facilitate phishing.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=newberry+math+and+science+academy+rating In PDF document text
    • http://files.glowingmermaids.com/uploads/1/3/0/7/130774993/dowosirajopavo.pdfIn PDF document text
    • http://zamoripu.solarpumpindia.net/uploads/1/3/0/7/130740393/f9239ad3544627.pdfIn PDF document text
    • http://poxadi.edgewoodlrc.com/uploads/1/3/1/6/131606177/2706999.pdfIn PDF document text
    • http://files.rehbocksolutions.com/uploads/1/3/0/8/130873855/5015757.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://708b78dc-b176-4287-ab80-a787f6e990ea.filesusr.com/ugd/e2c6c1_86b0505ec0074e0788f281923b8e920d.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8090/8949/files/21097413099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1451/9973/files/menefaberozobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3839/1970/files/navolawuwerekafimin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/porudinuvobojuluvapinuke.pdfIn PDF document text
    • https://0ecd3403-9dd7-4fb9-9d18-3d1d39d52f62.filesusr.com/ugd/a72fa8_eeb466b688214ee4954afc9c11a86f56.pdf?index=trueIn PDF document text
    • https://6e617479-aa35-4bb9-b050-b53a6793b774.filesusr.com/ugd/f6a907_7efe06f8de814456b669c478d57a5df9.pdf?index=trueIn PDF document text
    • https://527431ad-bed0-48bd-9d00-2eadf31cf4a2.filesusr.com/ugd/0582e0_2f96afcf6e564c3e8a79cd47b484936e.pdf?index=trueIn 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 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000422e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x422E 5304 bytes
SHA-256: 2eaedddc08816007a1ebf284a2266c4e07280cdc73612eb5412d1de461ba5234
font_01_sfnt_off0000541d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x541D 9148 bytes
SHA-256: 5230ff6fb80c8929da36f37157365e78c4632dd0ab5f57db0a802a3f4cca3f71
font_02_sfnt_off00007346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7346 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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