Malicious PDF — malware analysis report

Static analysis result for SHA-256 7673c4b76bff1c9c…

MALICIOUS

PDF

54.7 KB Created: 2020-09-16 18:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8099229f3398d1c2bfce0612349e88bf SHA-1: 38bb8cc142752a8bbb6eff43ece1a622f652cb4a SHA-256: 7673c4b76bff1c9c3f859c03ffbfb7fdf71180904859064d0d979bf9b2560983
202 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body also contains a URL pointing to the same redirector, suggesting a phishing or malware distribution lure. The presence of numerous PDF links further indicates a link farm designed to obscure the final malicious destination.

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.link/wix?keyword=pocket+ref+thomas+glover+pdf+free In PDF document text
    • http://nulabexab.westernanimalresources.org/uploads/1/3/2/6/132696063/patoxiwowu.pdfIn PDF document text
    • http://files.usceeri.com/uploads/1/3/1/4/131438128/a75e01382210.pdfIn PDF document text
    • http://files.appliedsciencelive.com/uploads/1/3/0/7/130738918/517d9.pdfIn PDF document text
    • http://tupez.diamondhomes.net/uploads/1/3/1/3/131384609/3380089.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/1/0434/6744/0294/files/kuzev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/wegikojegejokanirawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5411/2672/files/blood_type_o_diet_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/1160/9500/files/adriana_lecouvreur.pdfIn PDF document text
    • https://fbf4e847-cca6-4a9c-80f5-acb56d07fdc2.filesusr.com/ugd/dcf311_ce1d1c20277b4708bf0e1fde87370671.pdf?index=trueIn PDF document text
    • https://6384adf7-2cd7-46df-9afb-a79356f838dd.filesusr.com/ugd/2994dd_7cd72d3f3bf241f1af0ef3478f9dd72b.pdf?index=trueIn 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_off00008965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8965 5692 bytes
SHA-256: 573337e454e3d38d50e6f89900e75047b2e1a6a1b60b931d53614feba2277ab5
font_01_sfnt_off00009ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA0 16124 bytes
SHA-256: 6a4cfb309818a6f5e7f09170c7ee5b8729cd89ea209df7fe6f29fb0806221c08

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