Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f17fe1c8cd29ad0…

MALICIOUS

PDF

40.6 KB Created: 2020-10-27 22:43:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ebba4c47e7bafcf28d3583143ed9d81b SHA-1: de27f61faea35d0679201ead576cdf19f1c8e635 SHA-256: 4f17fe1c8cd29ad0f17d9a4ac04e73627887bc0d41347f1fca4177f2444cc3d2
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?keyword=soccer+stars+hack+without+human+verification In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f872bed85ae4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390661/normal_5f9425f13f158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382974/normal_5f9335b266068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_5f930b517eac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402721/normal_5f90f500ced5f.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/b8c3205f-da3d-4d4d-bd88-b3150b1a5d91/56744332829.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52205b4c-9811-4315-995b-75a29a7b9dff/difference_between_hardware_and_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/759f9fd9-85ea-4ea2-9ba8-578cc834be61/25555038459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d4f28b5-b955-421f-9e08-7ab0e3074004/76021163585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9377c61-5c6b-4aef-ae2e-3feb64cab19f/7055972862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9403/1516/files/kepeluganesolomakaj.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/24891594634.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/maharashtra_state_information_in_marathi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f974ce-af48-4069-bea7-2458b663d36e/436791843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4e64fe3-2f41-4038-a953-e3382f7a93a0/penawabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e1eb962-1471-4b02-bd25-14b2575e6078/wonowazulobipap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db7ee6e2-6941-4175-88d8-d8e24a2f5fed/jukoboxumotawuwuju.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_off00005e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E99 5408 bytes
SHA-256: 9863090fd0a008ee7c1ea4da4027086e4eddb5d4b8fe5f54782936b2c30747ca
font_01_sfnt_off000070e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E6 10884 bytes
SHA-256: a70bf51916e436e0a5d44580825aa27b6af19a1132e4b5ada06ac6c63a4f458c

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