Malicious PDF — malware analysis report

Static analysis result for SHA-256 21e1d820723fb793…

MALICIOUS

PDF

50.8 KB Created: 2020-08-01 15:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 269968c555a8cb4ea31f2c77e9704b1b SHA-1: 8c00735333eb32e3997820e75f94147710d058e5 SHA-256: 21e1d820723fb793f0d339c95176acfc0a2875600c04bf0ebad964e6530f4fa9
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found by heuristics. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware delivery. 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.ru/pify?keyword=virtual+villagers+4+walkthrough In PDF document text
    • http://files.asiaticofusion.net/uploads/1/3/1/3/131383247/xadisugowapar-ridumofa-foxawake-fujoj.pdfIn PDF document text
    • http://files.voetlichtpedicure.nl/uploads/1/3/1/6/131637313/7108803.pdfIn PDF document text
    • http://files.caitlinshome.com/uploads/1/3/0/8/130813730/8922494.pdfIn PDF document text
    • http://files.greenphilsinc.com/uploads/1/3/1/8/131859261/napoz.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/1/0428/9835/8432/files/84113106953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/nopogenapotelebi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3260/0985/files/sidaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/wurukivefimadelunojezugor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4542/8122/files/vowenitasajixitaxanezuwos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dilos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/75378732696.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6310/8003/files/sitezaliwepukasaniraxeje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2335/8358/files/nowokiguxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/22196559875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/fotelenawivufagefiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9054/2753/files/ratoxewubadimovasiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/97556122765.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_off000088bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88BD 5216 bytes
SHA-256: 1204fe6e6677222a1784d9e5d8e10dab3ef122c253d3feef69e7967e9d92470d
font_01_sfnt_off00009a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A90 10532 bytes
SHA-256: 13f75201f079f6b8811e8876b48eee0bfbbdb03f3669e92cd0279052c61f5ff8

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