Malicious PDF — malware analysis report

Static analysis result for SHA-256 7924a3bff3c968c9…

MALICIOUS

PDF

40.0 KB Created: 2020-11-08 13:54:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8adead8c5410380a6d46b7829d484636 SHA-1: dd5e30caf1dbae3c4f5f801fd719c752e6554de1 SHA-256: 7924a3bff3c968c9c9368145d3294132a3ac1087d3496f85cd9338b3a7816cad
134 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a malicious redirector, specifically designed to lure users with a fake login page for 'Westchester county clerk land records'. The embedded URL, https://cctraff.ru/aws?keyword=westchester+county+clerk+land+records+login, is flagged as malicious and likely leads to a phishing or malware distribution site. No scripts were extracted, but the overall structure and embedded URL strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?keyword=westchester+county+clerk+land+records+login In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/tugunari_fogeze_nezejavoz.pdfIn PDF document text
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/lisaxidokavotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465704/normal_5fa2bd2e3133f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421218/normal_5f9aabde61b37.pdfIn PDF document text
    • https://zijubanefim.weebly.com/uploads/1/3/4/3/134349059/5581882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414689/normal_5f976c711e18b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453335/normal_5fa663badd787.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f89d47b1a919.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/8075362085.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/65736696815.pdfIn PDF document text
    • https://fonupelexi.files.wordpress.com/2020/11/brookfield_place_equinox.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/large_catechism.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/84066503458.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000593f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x593F 5380 bytes
SHA-256: ab77d5d485338327360073a58b59003b12d6e12104c3c747ca41959b00cebb56
font_01_sfnt_off00006b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9C 12172 bytes
SHA-256: ca8bb4a151dae479b33d888dee719a93726d9d1f61dbd2e25e18914c940c7537