Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb93e2c71f60aee7…

MALICIOUS

PDF

56.9 KB Created: 2020-08-17 15:12:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3547fbcec9ec397b2cd8dd35da1a396a SHA-1: 58057402b673a8d07611a7e513714b434fdac3ec SHA-256: fb93e2c71f60aee7b2b867705bceed485d61e339a277102517578356beaa7676
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains a URL that is also present in the heuristics, suggesting a lure to external content. The ML classifier strongly supports the malicious verdict.

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=manualidades+con+material+reciclable+paso+a+paso In PDF document text
    • http://gububob.samuel-evans.co.uk/uploads/1/3/1/6/131606027/sujeluduzetebaw.pdfIn PDF document text
    • http://files.youthtechnation.org/uploads/1/3/1/4/131408068/c6b00.pdfIn PDF document text
    • http://files.willisband.org/uploads/1/3/1/4/131437655/nuviwu.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/1/0429/1143/2857/files/kowinuvudoxune.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6766/9654/files/89457714461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1600/9374/files/webadawinipiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7311/7087/files/wijopazixobujo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/podemobubozerifusamuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78030006053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/kolulifogejimupebuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2641/4749/files/wopekukeniwupira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/24523380577.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_off0000a201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA201 5364 bytes
SHA-256: f6b9ec41783558fde00a7de48a9a6edbf721e9f340b3cd7964b9df077e2df00a
font_01_sfnt_off0000b41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41B 10204 bytes
SHA-256: 8834aec1f28feac67f25190f0f91d1fe623383c85fa4feed398c2958a2d73746

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