Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f31f95e595017a0…

MALICIOUS

PDF

36.1 KB Created: 2020-11-01 08:59:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7b39341aac0d9057d92e6f71a0437f5f SHA-1: d7aac5047377cd7216b94d0db304dd3883a667fd SHA-256: 5f31f95e595017a00abb38955e7d1345f2602914e6d31aad68d8478868acd2e3
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.club/123?keyword=atomos+ninja+2+review In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5f8c49e0a0176.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/fe3a23c8-7a0b-441e-a3a7-9143f1890f84/51249103577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c2edb04-f699-4730-aa7d-87efbc53e3f2/dulutifik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9753/1590/files/united_as_one_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/6861/3308/files/descargar_whatsapp_apk_para_android_2.0.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/25256194480.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/69835067402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5491fbb2-da0c-474b-9ef5-37f2d90d961d/engine_2_7_day_rescue_diet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5264/4511/files/junefazixekam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/9524/9847/files/tubifarudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/443063e1-4f75-49bc-a912-503b3168eae4/fozopojuvavegorujufake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/medical_abbreviations_sentences_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4372/0868/files/87740099792.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_off0000509f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x509F 5148 bytes
SHA-256: 18d825aca4241abf2e39a89f0a583f3213159577ee2759523d6c93fa1aed71d7
font_01_sfnt_off0000621b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621B 9980 bytes
SHA-256: 0fcf65057e3567021cab3c725cadd8f35ce0d3ffaaaf991863d570a9084978b3