Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b7b8cc62787366…

MALICIOUS

PDF

42.5 KB Created: 2020-08-10 07:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 698b18b062c4994b99ecb18c12d463ef SHA-1: e33d3ef7995daf1c6fea5653d0fdee33f4bbcaf8 SHA-256: 15b7b8cc627873666c484f76e64cbbb8401acad72ad66fff5b52ae347a626d7c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating it points to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which likely serves as a gateway to a phishing page or further malicious content.

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=media+writing+print+broadcast+and+public+relations+pdf In PDF document text
    • http://files.napervillebigbandjazzfestival.com/uploads/1/3/0/9/130969772/majijevupuref_giguranali.pdfIn PDF document text
    • http://files.essentialblitz.com/uploads/1/3/1/4/131437736/xagen.pdfIn PDF document text
    • http://files.harrisendofthetrailranch.com/uploads/1/3/1/4/131408738/julaziw-beturinis-pajolosedexi.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/1/0431/0607/4780/files/81601909077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/andrew_jackson_biography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6922/6656/files/cours_d_anglais_dbutant_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/64363416903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/lakiguguvosubuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3577/1558/files/2241293980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7963/9967/files/sunataxesudilivuwifunoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9723/5363/files/robakedulub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4091/3046/files/96765640651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1503/5291/files/87102143697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2638/1975/files/tales_of_vesperia_warehouse.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_off00006735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6735 5560 bytes
SHA-256: d04cadc4f5c2be9b0e83c4a21759c6afb6723ed309c4551107aa9e34dcec6b7e
font_01_sfnt_off00007a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A48 10016 bytes
SHA-256: b1274920bc70760792ca5eba0670ae648179d5c66d1255e4afc86df811636762

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