Malicious PDF — malware analysis report

Static analysis result for SHA-256 51de8dea175c3213…

MALICIOUS

PDF

41.7 KB Created: 2020-08-18 21:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4cb98c27d7a4375eb5515d7264d51293 SHA-1: 4d2f724d1c610221f24b5b3474f311c56b21e975 SHA-256: 51de8dea175c32134fb623cba53a48335d2a209f03418548e4e98d42e65d7c23
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=pulmonary+embolism+diagnosis+and+treatment+guidelines'. This suggests the document is designed to redirect users to malicious sites under the guise of providing information.

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.com/pify?keyword=pulmonary+embolism+diagnosis+and+treatment+guidelines In PDF document text
    • http://files.billiedepatiedesigns.com/uploads/1/3/0/9/130969809/talenure.pdfIn PDF document text
    • http://files.christinabhoward.org/uploads/1/3/2/7/132712661/710351.pdfIn PDF document text
    • http://fefon.damienlbutler.com/uploads/1/3/1/0/131069934/zikudepu.pdfIn PDF document text
    • http://files.alamoheightstheatre.com/uploads/1/3/0/8/130813314/667cb.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/1/0428/9173/9295/files/14186152774.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6693/1865/files/read_breaking_dawn_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/1088434118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/47261846195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/mentor_thank_you_letter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/nokuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3956/2645/files/hotel_credit_card_authorization_form_policy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78683638278.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 6

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_off00006567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6567 5388 bytes
SHA-256: e9125bed430c35449aa6d9d3ebd6f75322fd6a11c94385e1c5574027fb795670
font_01_sfnt_off0000779b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x779B 9844 bytes
SHA-256: c95d90e9180a7212dbd5291e309d47a13cf820a8252ebab9c4e2b5fdad334e43

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