Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be154861a9af2b8…

MALICIOUS

PDF

33.1 KB Created: 2020-08-22 00:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 66c1b294a289fecd6c0d1968d79cb25d SHA-1: efff1194df3eff6b85440fa169f6a034d8cf68fe SHA-256: 4be154861a9af2b8a7f0479633f4436c6f622bbe93f167470855cef6a90a049b
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggers this redirection. This suggests the document is designed to trick users into visiting a malicious website by presenting it as educational material.

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.ru/pify?keyword=exploring+waves+physics+classroom+answers In PDF document text
    • http://files.sugarhillumctexarkana.com/uploads/1/3/0/8/130813821/f48d9.pdfIn PDF document text
    • http://lezizo.maranathabiblens.com/uploads/1/3/0/7/130776132/4893919.pdfIn PDF document text
    • http://files.contemporaryislam.org/uploads/1/3/1/1/131163898/7d1e98f4987.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/1/0435/2638/9912/files/99297414433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2970/7422/files/20644260886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4492/1766/files/34172766956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8915/8554/files/aceites_esenciales_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4183/9511/files/fury_warrior_bis_vanilla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3777/5256/files/padadikik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/wumen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4098/1660/files/88930761432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/arithmetical_reasoning_tricks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/world_or_warcraft_monopoly.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_off000045ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45AD 5624 bytes
SHA-256: 27c7f514bbff88696ec1c3c9665ace90f93c537ce7cde8ed19c48c6e757a6396
font_01_sfnt_off000058c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58C5 9068 bytes
SHA-256: 3dcc6f253ea05b8419a6f78e7d3967ba450577d9af9f78f06fdce0513a9e4632

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