Malicious PDF — malware analysis report

Static analysis result for SHA-256 837dde19d6bf1ed1…

MALICIOUS

PDF

50.2 KB Created: 2020-07-31 08:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 331096e2dc339e8f5120016d6664d26b SHA-1: 6a881d72a8d39674622b6f6af3e89c62d0db7072 SHA-256: 837dde19d6bf1ed118cb7ace95e90985e0f6c9bd06327b6640378013a25145f1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links designed to appear as scholarship essay examples, but these links redirect to a malicious link farm. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the document is part of a phishing or scam campaign. The ML classifier also strongly suggests maliciousness.

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=winning+scholarship+essay+examples+pdf In PDF document text
    • http://files.rosedalehorseshow.com/uploads/1/3/2/6/132682681/varino-nonukededu-jobob.pdfIn PDF document text
    • http://files.bendigowoundmanagement.com/uploads/1/3/1/8/131871477/607340c38b12f5.pdfIn PDF document text
    • http://files.mertoncatholics.org.uk/uploads/1/3/0/8/130874296/lutup_xokolefivo_nomufovixok.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/1/0434/4217/6150/files/futunikupumusugan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3817/8471/files/bumeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8070/3382/files/79409065866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/vixadelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1062/9532/files/3024796901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/zowutuxiziruro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6133/7494/files/dukogegukogumini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8583/1080/files/lofabosolefod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/niweduwedejovepelosof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1896/0541/files/28147258344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8035/8815/files/pekujonajugunagotitaxozug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/gizakelawikexem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0804/9830/files/xisegogawuponateno.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
🗂 Part of campaign: mertoncatholics.org.uk 3 samples

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_off00008569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8569 5460 bytes
SHA-256: c1eaf78ea6903c051da0b64dde02a6530558b13e5b84a91cee409f4133b37bdb
font_01_sfnt_off000097d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97D8 10440 bytes
SHA-256: 10d28e9667d1cc84c9911dd2e1c6e652c059888af28a2c92b8d93b70cc34e356

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