Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d7ac9c89bbb787…

MALICIOUS

PDF

39.6 KB Created: 2020-11-04 09:20:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f2d90b5758733335b6d4e4f0e530ce06 SHA-1: d66a57c0602a70e5d11fb0d369b481fd13faa922 SHA-256: a0d7ac9c89bbb787f78cc45d278532119eef3575a3027e24d887e4ef62b99482
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=clarken+johnson+jr+high+school In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f87d9c9b01c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f889cf3e5758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5f88f5e5bc688.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/1577f511-c0d2-4d50-a0e3-24a6aa8cb1e1/74491294985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c236e1e5-8122-4f6c-a91d-736bdf6b6bee/13582985419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f29a0a-9dcc-4627-a1c4-e99ba834620b/chaudiere_centora_code_erreur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a09f5bc-d5c1-4b8a-81a4-7c9d91c19cf7/26002413455.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74214199-db8b-422e-bbb3-224dd2c53e2e/spring_hill_high_school_ks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08b61829-ea0e-4795-863d-53b7f3c46b46/wuvatedikadowupexo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7448a273-f61d-4d8e-8931-2bb645a0cadd/6908935784.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7275d5c1-0ea7-45e5-a367-5615d2111839/unblocked_66_ez_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f069af41-4c37-49c4-a966-bbe6c982bd1d/microsoft_wireless_keyboard_800_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38605fef-eb38-40cd-bf2f-f42edd72d889/xafusuridalipob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8f50e6d-7d37-4c4f-ac87-e006595eb8f2/laxuzowajix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b338096-6ad2-4ede-82ff-6b6c43d30b47/gopifobowomir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b9307fb-7e7e-4ff7-8fa4-0ffc56f727d8/nuleve.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_off00005a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A33 5108 bytes
SHA-256: 3b87b097291d0eb7b6dd40fc891107c5dc46cda8c51f81f030ef4ce00c13108c
font_01_sfnt_off00006b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B91 11336 bytes
SHA-256: fd92b1595b2fd8903a0254f168cca159b409615e0731f5548ba17f513c5380d2