Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b98a1504896909c…

MALICIOUS

PDF

42.9 KB Created: 2020-08-17 13:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 48ed4a8954e5e836afe24e4794cfb0b6 SHA-1: daa99fcb9bf9954ec02b6d6f2b1c3aa7991e36a6 SHA-256: 8b98a1504896909cbdd90f3ddf6328e819b809bb50c48f2ef247320476feadd1
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body text, though partially obfuscated, includes keywords related to 'Aston university sixth form uniform' and references to 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to defraud the user, likely by directing them to a phishing site or a scam page via the embedded links.

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=aston+university+sixth+form+uniform In PDF document text
    • http://guzoji.centralillinoisslotseries.com/uploads/1/3/0/8/130814411/40238bc2ce872.pdfIn PDF document text
    • http://puzetosem.cmgaesthetics.com/uploads/1/3/0/8/130813747/tunubaw-tesaw-zojef-gizeri.pdfIn PDF document text
    • http://vapuneki.highplainsgunstocks.com/uploads/1/3/0/8/130874633/ziwekukadupupavukigo.pdfIn PDF document text
    • http://files.littandco.com/uploads/1/3/0/7/130739007/3812b3.pdfIn PDF document text
    • http://files.wildcatwc.com/uploads/1/3/1/1/131163890/wowegoroz-wegiw-wujefenideri.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/1/0434/7170/0120/files/61664594167.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2128/6050/files/javatpoint_spring_jdbctemplate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1796/0600/files/bitofelegadofagolikigojox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/88095761659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7916/4314/files/85111974454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/tulonijomebedapazidiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/xagujemebaziba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3096/9511/files/79821490131.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7791/7085/files/adam_smith_absolute_advantage_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1530/6405/files/fonetojiwuripi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8764/3303/files/pebemewopab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46283819311.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E5 4984 bytes
SHA-256: 9c5a3b20cc4815c09992bcbcec0923a730ef95c976b805203ffe476b01a0f0fc
font_01_sfnt_off00007aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABA 10568 bytes
SHA-256: 2d00baf8ad263f612eab384c816755033a979e450fbfe1e5263e6661102fde98