Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d09c16a4cbe422e…

MALICIOUS

PDF

39.7 KB Created: 2020-08-18 18:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a8d4f1f5da22e8e1ca404e4c3a12a1c SHA-1: 2080cf3992748f9e29fa53ca99c01f51b437eeaa SHA-256: 5d09c16a4cbe422e338c56b95c10e89c0cbf85e7bf09468fdcf3866a2a674e2b
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The heuristic firings indicate the PDF is designed as a link farm, likely to obscure the final malicious destination. The presence of a 'download button' lure further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=hester+biosciences+research+report In PDF document text
    • http://files.possibleframe.com/uploads/1/3/0/8/130873839/xebonurunukareb_donolubus_pokomarum_kugeruxudaret.pdfIn PDF document text
    • http://files.nevewinter.com/uploads/1/3/0/7/130740221/ripemizirimeje_wokedisi.pdfIn PDF document text
    • http://files.kovametalli-in.com/uploads/1/3/2/7/132741535/sudufakopo.pdfIn PDF document text
    • http://files.whartonlibrary.org/uploads/1/3/1/4/131438784/3214097.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/1/0437/0851/4455/files/anouilh_mde.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/rahat_fateh_ali_khan_songs_pagalworld.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/79031724295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4930/3720/files/upbeat_and_inspiring_corporate_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/nypd_exam_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/94777549004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3460/5728/files/ziwivosezukusolixa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/tunemevisomanemuremel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5528/4373/files/79089915415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8209/5517/files/wenatonatilo.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 5

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_off00005bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF8 5088 bytes
SHA-256: 49c9f73b45fdcfc9b1a6ef6396b810c2fe7a0ae59022b48dc87b48e781f5a299
font_01_sfnt_off00006d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D34 10844 bytes
SHA-256: f2bce2832ec3091a8842a60afe89f58cc2495a27194f5c46f904fea9f795bb71

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