Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb83d7e71900fc8e…

MALICIOUS

PDF

36.5 KB Created: 2020-11-01 20:53:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 757f7bd2db4712c88647381bb017cb2f SHA-1: 5ac9ef29821fc2f3e2f9894d9e01c31a85a766b2 SHA-256: bb83d7e71900fc8e35e237420d49e9c52798bea7def632d55f70995d2e1854b8
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://cctraff.ru/123?keyword=zombie+shooting+games+unblocked+66 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f8a32323cdfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_5f8f41a99cf72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f8d3f7c697ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5f9d4de061769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5f88a97c39d71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410433/normal_5f9385fbe0186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413375/normal_5f9b687322889.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8237/5864/files/barkers_shoes_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5546/2591/files/android_casting_to_apple_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc1b53d8-7470-4280-8b0a-4cf31ae45b84/63826152759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7025/5004/files/vusasonilowoxazizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e8d65e2-3a83-4f7f-aea2-12475b6890d2/mebegazupigob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f61168-0b54-4cd9-90dd-0e19ca72debc/29063406954.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_off0000514d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x514D 5572 bytes
SHA-256: 8a9f0b2094de208a6dda6d23b30c85dc3b355c2f3d0d2d265e8ab70fff2bfce6
font_01_sfnt_off0000641c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641C 9688 bytes
SHA-256: 0dd6f7c7dbf391e5fe28d02b679a1d1d6ec0c4b316815c4b3625da3bd573eabf

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