Malicious PDF — malware analysis report

Static analysis result for SHA-256 30cd6461d9fac86a…

MALICIOUS

PDF

38.3 KB Created: 2020-11-03 23:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a9576ba244304b374cb11b120b2097b3 SHA-1: d4c7fdec88ca59b31bf90d22bd2e1043fc48fa04 SHA-256: 30cd6461d9fac86ad468e092e6e09773348c786cd5926bdcb201b66562d2a37e
94 Risk Score
Tags
free-cdn-ebook-manual-lure

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.com/123?keyword=lexile+score+chart+high+school In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389127/normal_5f8f8d555940c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_5f91efced1cb9.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/d88891da-5ece-429f-bc0c-30e99a2fece4/gejagunojevakujawosoxogob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36e0cbea-546d-42b1-bfa8-4f45a1b2fe7f/advanced_digital_design_with_the_ver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8307835-79bc-49f7-8279-1c118a29052c/fresadora_en_ingles_se_dice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f74fa77-1e6a-4b0d-824b-49bea3716f18/35259035508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b06127c-6609-4faf-98ad-460758d6e982/jon_duckett_javascript_and_jquery_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83fec55f-e31b-4aeb-b4b0-923203608404/50991683361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56f1532a-47f0-4834-8be5-9182e179c805/logiciel_mesure_plan_gratuit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86251b06-1653-4741-955e-4b537cfdda80/samsung_refrigerator_rf263beaesr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f12c1f53-d190-4ac8-995a-5787f3cf28c2/pathfinder_ultimate_wilderness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d323a066-1022-4e69-90f3-370dd8aac75a/jevinagubuserejizawaxuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bfaf7ac-98b3-41f3-b51f-eca992855d00/24651554972.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_off00005806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5806 5072 bytes
SHA-256: 48253848b2111bce3277821199627a1f632a2ff209640adb05db776067708e02
font_01_sfnt_off0000694a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x694A 10256 bytes
SHA-256: fe79a00163993702523c77d6dd17243aadbbe9d10750aec527ad2b438ea4e26a

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