Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e7f857c47c1d43…

MALICIOUS

PDF

42.8 KB Created: 2020-10-28 08:14:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 5553431ab6061de254b83fac66f8eebf SHA-1: 6b01c1f5c7c735d2b64e0672c2c47e05b27de06d SHA-256: 24e7f857c47c1d43b06b22a7e7001737b3fb54a610477ff7864d0e1ea0f94509
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.me/123?keyword=highlands+ranch+community+association+phone+number In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_5f9089ae634b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415051/normal_5f96a35f9059c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5f98fb432aaf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_5f9244184dca3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402940/normal_5f96106924705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5f89bc4128b0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375696/normal_5f8e289c2576c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417429/normal_5f9839080e245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371524/normal_5f89ecfc19404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f9729e95700e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374847/normal_5f89c721d326c.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005bf4.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005bf4.bin)
    • https://uploads.strikinglycdn.com/files/7e07f5b7-1eff-43e4-aff3-69549a7917a1/julusorinobezaxivov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/543e3226-fb0c-495b-969b-f9600800f010/62379434463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c5719a9-d8e5-41b5-8638-ce5ce4f731c4/where_to_download_halo_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af9e50e2-ec0a-4fb1-920f-189c907e8a7b/kexivixolela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f159183-1bdc-4104-becc-15977b1bb071/naliragodavepewato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/327d3eca-f22f-41cd-abb6-7ca74b21ae68/73199278293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc133f9-5836-4c23-a8ea-9a1d1a38f881/rubosizabovawum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/575ac746-7c8f-48db-ae7d-74b59969bdd8/98056147468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9338b3b7-7bac-4a0d-bfc4-b7212d2bc1ba/bikon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e89faeb-8250-4b35-bf54-b8f2d8f54d9e/nuxetes.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 extracted file (font_00_sfnt_off00005bf4.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF4 5692 bytes
SHA-256: 59561494a1becda08746dc7d3e4480720b3e4964d89fd744c018a390715bd04d
font_01_sfnt_off00006f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0E 1848 bytes
SHA-256: 14db0273f94b247bc3ea06d74a36014e1a61f3d05e8be3996c382c8be7bc2151
font_02_sfnt_off0000780f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780F 11048 bytes
SHA-256: 9c25764e0e371e31a72dd1c5c22ee877f0ce92c87bb652ddf5862bde19a8dd57