Malicious PDF — malware analysis report

Static analysis result for SHA-256 c438c3b802bd5ebf…

MALICIOUS

PDF

39.8 KB Created: 2020-10-31 03:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fa5e644773c41091e2a7d27bcbf2d033 SHA-1: 158d2cf106aa6b09f7bc3381ff9e1c72ade01415 SHA-256: c438c3b802bd5ebf113264135bb99ae18fe661335f1df0785de335175c2b8613
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://gettraff.ru/aws?keyword=direct+and+derived+demand+examples In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f870fb216ce9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419225/normal_5f9817527f4c5.pdfIn PDF document text
    • https://kolivobaka.weebly.com/uploads/1/3/4/5/134500933/pameletapivoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367960/normal_5f894aa7c8cfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402711/normal_5f9929aad2102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371800/normal_5f979be78372a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8b1e653f69f.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/1/0438/3752/2082/files/10218635466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfd5eb25-1d8d-4172-a77c-001f3486faa1/19th_anniversary_gift_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c64c2af-532f-40e5-a8cd-7de515968ec5/la_separacion_de_texas_causas_y_cons.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3302/1594/files/cinematic_storytelling_jennifer_van_sijll.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/7026/2202/files/exide_xmc-31_megacycle_agm-200_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8170/4647/files/aphasia_picture_cards.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_off00005d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D72 5348 bytes
SHA-256: d3db58472e0bb301709424c56081167f1e09e50d3808962ec5bc13ba0b3ee027
font_01_sfnt_off00006f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F96 10292 bytes
SHA-256: b370148828c0c481edc41dced47971bef59568ea6a2f68d9a60452a93ccc4bdb

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