Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19ef8190b6c1338…

MALICIOUS

PDF

44.3 KB Created: 2020-10-26 06:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 51e6387e9a0b887cfd5a71dd8d2f2f85 SHA-1: d3e843bcb4bcceb0238121b60dbf5ab5d130df43 SHA-256: c19ef8190b6c133861836751ca62ff13dc89d5b1f824dddab9dfc7e65a9b80cd
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.me/123?keyword=nobel+prize+list+2020+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_5f91cbd4a3096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392661/normal_5f92a07c05cfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403937/normal_5f95341423164.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_5f8fe85f83e7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377905/normal_5f8aed659c29d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379029/normal_5f8b13a20792f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5f87453a38d47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/kuxujexiweminin.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/zufasaviwoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/advanced_javascript_tutorial_point.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/geometri_antrenman_kitab_2.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/adk_high_peaks_trail_map.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/aircraft_illustrated_parts_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/89810104609.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/18244386599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecc698c5-d037-488a-a902-afb528bff550/pdf_harry_potter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d355248a-0e08-48ef-bb35-84b4ae3107fe/fasubosulumosijonilotod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96577625-db57-46b6-9f15-b5521cc5875a/45142924258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c11b6ec-1e1f-4fea-a466-d2d3e2e1c39f/18905034675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e0f2e39-c35b-4d10-8c26-30f77cdafbf2/tetexupatotetomirefuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9623ce2d-295f-46fd-93f9-8eb2f31158d3/pewub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf76e36-b03a-4630-9145-640ecf705525/22119814685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16b4a000-565a-4b73-82c4-959b63db1c1a/95431580648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8fcb36f-0841-4661-83a9-f7200a4e1ae4/ap9619_password_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8d2c0e-fcef-4316-91f1-0d7810bb9c19/dudokuwiziwitulurumeba.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_off00006bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFC 5260 bytes
SHA-256: 74f15f8d4557ca648ab712b51ced5aee4e428adeeed175a0d61e6efc0d7ab63b
font_01_sfnt_off00007dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFB 10888 bytes
SHA-256: d6d889d420301f534496837cbde2620f2e0cc59fba2f8201cbcd43577afe93c9

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