Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff542666d0e9f2d…

MALICIOUS

PDF

52.9 KB Created: 2020-08-11 13:54:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7ad932eaef6ba0668c371866fe641c5f SHA-1: fbc80b88e6617b2bb914402b09b9c756ddbf8ee1 SHA-256: dff542666d0e9f2d0029828d50388b740384a1f010e69e069baa623141f044a8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the PDF is designed to redirect users to malicious sites, potentially for further exploitation or phishing.

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=how+to+ensure+validity+and+reliability+in+research+pdf In PDF document text
    • http://files.fishuntessentials.com/uploads/1/3/1/4/131406751/a30e222743.pdfIn PDF document text
    • http://files.kimatangles.com/uploads/1/3/0/8/130874480/5914744.pdfIn PDF document text
    • http://files.believerschurchleander.com/uploads/1/3/1/1/131163859/6f51491c6d.pdfIn PDF document text
    • http://files.landscapeequipmentrentals.com/uploads/1/3/0/9/130969695/8005805.pdfIn PDF document text
    • http://files.alatebloomer.net/uploads/1/3/1/6/131608016/paripunomipeni-dalatanezu.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/1/0431/6423/7992/files/vovarexezoduzemuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4834/3464/files/apprendre_la_conjugaison_anglaise.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7957/3414/files/nakazugaravudoram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/muscle_gain_workout_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4299/4336/files/37443837689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4738/6264/files/air_pollution_control_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/ziwotagonalepumuled.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5822/4549/files/gukanuxonedupubabozita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2528/5798/files/30599222590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2866/7816/files/centos_6_network_configuration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4971/1781/files/gojurefogosuxalago.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/73251279254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1400/2587/files/non_aqueous_titration_download.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_off00009035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9035 5596 bytes
SHA-256: 24a0607e0045395774db2b3dfefc96ed2b57afceeeca6472670ecd7d760ae3c1
font_01_sfnt_off0000a34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA34D 10096 bytes
SHA-256: b4fef8aa7f62c9b14e88c0a78c0538583c693c7adfaa63f6bb05deab0f08a280

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