Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d955021d725fde…

MALICIOUS

PDF

43.5 KB Created: 2020-08-10 04:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d520a56ab536b4d5b95df853973eac5 SHA-1: ddbfdf5bb56ceec6de6972095d074cf5ce07ab39 SHA-256: f5d955021d725fde5548c527524937a0e17a4cfe35a2cba1914515c50ebdf147
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing for a PDF link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector link. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves tricking users into clicking these links, which likely leads to a malicious site or further payload delivery.

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=engineering+applied+mathematics+2+pdf In PDF document text
    • http://files.diskyoto.com/uploads/1/3/1/3/131379219/tovotofunemor.pdfIn PDF document text
    • http://files.caritas-academy.com/uploads/1/3/1/3/131380288/755478.pdfIn PDF document text
    • http://diwulom.yourlocalelectricians.com/uploads/1/3/1/3/131398360/fowizepex-dobutojo-pojegubewep.pdfIn PDF document text
    • http://files.churchgeneralcounsel.com/uploads/1/3/2/6/132696210/5829473.pdfIn PDF document text
    • http://zibexu.bareprofessionalsugaring.com/uploads/1/3/0/7/130776394/gawunepewad.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/1/0433/1618/3205/files/ripovevileb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5706/9736/files/swisher_ride_king.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6318/1473/files/12750986032.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/81301326048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8516/7766/files/4866462175.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/12558421325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/jigiwum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/kapekawefabilaweroxumaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1023/6321/files/povorapumukoxeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8861/7378/files/11378938623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9418/0001/files/fefujuvenenepupozegatem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/how_to_cite_references_in_apa_format.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_off000068fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FB 5660 bytes
SHA-256: 8624c720294aed3123e98191c446e94bc1ce2e69670db5b70360aee8e9eb296d
font_01_sfnt_off00007c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1D 10796 bytes
SHA-256: 0387cdbf165398840e9b84e9a4c7de7b11accfcd6b23abeab47fb7dda74f3102

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