Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1596bcdd6cec336…

MALICIOUS

PDF

61.5 KB Created: 2020-10-17 05:34:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: febb691609aaf1b053639ab5085b8a14 SHA-1: 6164efbb0e7c01405f775081fed55ae8126aa600 SHA-256: b1596bcdd6cec336edd9c1034302dedd671d41913bd176b456cfb98a23491f0d
134 Risk Score

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://ttraff.link/123?keyword=caldera+baxi+main+24+fi+manual+espa%25C3%25B1ol In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f87548a41d12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f870bddb3caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f87e7560ac62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f8a406603e66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f8714f9d4017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f8a0d92a08df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5f8a2ff8c6c66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f88050957ab4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5f898a8820a93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f88b15f6aa22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_5f8929657ec80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f87bdaf78d5a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/725e5b72-0066-4f28-86e4-13983c041776/65758107732.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b05c2d87-13bc-4e0b-bda4-03ce9a532f3c/89699246869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad5c77e-db8e-4cef-8445-c1188addedca/82482663956.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2576f23-266c-4dd5-bd8f-2c20481753ff/38599833827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/088104e0-90f8-4808-8552-9514346a5702/79675134056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac15352-02d0-48b4-8733-aa6126a41ecc/sonadim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bea675c-6402-431b-adca-c4d85caa2b94/datemunesanupedi.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_off0000aaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAAB 5732 bytes
SHA-256: 266c6436edf6b7c459e9c8cb04a8b9c8d297d0aa7a286ee40f35976032035409
font_01_sfnt_off0000bdd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD1 11760 bytes
SHA-256: a3db8ca1bf23d183c650ed4b661d0c9e9ec4e016734d411cadb488dad48be573

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