Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae8a98a81972e51d…

MALICIOUS

PDF

43.5 KB Created: 2020-11-05 00:55:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 543a7bf9f1b7d72f5fb3ff951ed94b11 SHA-1: 2663a995fcb281572867c440eff0eeaafea95d18 SHA-256: ae8a98a81972e51d15cc7bda1a5df872cdc6f41f0826a8dc4b93ed0cd27c2ccf
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector infrastructure, indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also flagged this PDF with high confidence. The embedded URL 'https://cctraff.ru/strik?keyword=achey+sore+feet' is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site.

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://cctraff.ru/strik?keyword=achey+sore+feet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393916/normal_5f9f86f27f76b.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/9ed9b8f9-193e-4ee7-926a-6358b66898f9/10813918740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/900cd8ca-a85c-465d-8d0e-861fd7f0fb41/98958601300.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a4e323-f576-4fe3-88c5-ade2477aa258/jazonalojobafaxujurufogin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09cc6b3-abaf-44f9-9e36-8135c4f126b7/mario_party_6_ar_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb82f0a6-8ec1-4a2a-8879-eea36ba982bb/50058015187.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9b1c0f3-245e-4a5f-818b-2d3577f02e7a/save_bitmap_image_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07c1b725-757a-4f50-ab1d-4bd1bca70d88/restaurant_week_new_hampshire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad618a5-c4b0-4f3f-821d-c2b3dddd85d1/exerccios_pronomes_6o_ano_com_gabarito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0a5cbc4-b29b-4f1d-b827-2e177823abcb/74850328649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccf216a6-a6cd-446b-8e97-3c8dd267116f/69482036768.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3714b772-09da-4464-a6cf-65adf5973dd0/bumumawupanezuxifironud.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_off00006e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E45 4820 bytes
SHA-256: 81a9bd360e78038944633cc149dad60ca1b18b8d8a62394aa4b8f38227601bb6
font_01_sfnt_off00007eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB4 10072 bytes
SHA-256: edce541456c8a7ab2743f7bdda8d77b23b01c0be3828a003b1919717386505f8

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