Malicious PDF — malware analysis report

Static analysis result for SHA-256 405877d5d413e5e8…

MALICIOUS

PDF

41.6 KB Created: 2020-11-05 11:12:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8ffb423401b4ab72205a768228b11988 SHA-1: 25cb875af97a6bb1af67e3092a9d20b8d3979456 SHA-256: 405877d5d413e5e80a0822384c2874e959ec6562710b90a90f13c9cf93a2d8e2
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.ru/123?keyword=surface+area+triangular+prism+worksheet+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5f9b26e934e84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f8876b8bf515.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415308/normal_5f9f0d61ec5b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_5f9018b189ea8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_5f8a73babcc10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/956eb4ff-5b83-4b76-ade7-d4bdca9eefaf/17160158675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f592ff77-4d3c-4892-b0a2-2d825523fa64/siruvapafeti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a60378c1-087f-4003-ad0d-83de8240d648/fumujapuvejumoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eae23d8f-3459-4348-8308-b47c73b75b70/murede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7cd3434-2e32-496f-832e-071e27bc8ee9/15486994980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/726e02eb-7c28-4c9a-acbc-0ea9f2c679a8/30759119000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d274e96-501a-408c-aaeb-91bc9d10ec16/18278005226.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/spelling_test_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0684a9c-121e-45b4-b83a-f3ad46badf84/39691943115.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16e1a33f-ccd4-4c52-b54a-5f268909f5ab/tinij.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54EB 5712 bytes
SHA-256: 84a7ad45b1350986435633ba91ed9359645ac4fbfa3ed663a4a593dbfd66dd20
font_01_sfnt_off00006833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6833 10124 bytes
SHA-256: fd4b618cc3ea7ec52a74220a47a881c98606477d510cfe65c743566a34cb363e
font_02_sfnt_off00008ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.