Malicious PDF — malware analysis report

Static analysis result for SHA-256 c647ef28c7b9f5e6…

MALICIOUS

PDF

42.1 KB Created: 2020-10-28 16:24:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a468e586831ce3f46bc6970ba2054590 SHA-1: dcdeccb8240c5adedeadfa6b22ad8a2c40036008 SHA-256: c647ef28c7b9f5e6af67ba6901b0462d1c7a08ed56708df1b0f81af72da6de09
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://ggtraff.ru/aws?keyword=ranxerox+3+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f8724122f374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f870b94f0db5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384647/normal_5f941e820cc40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f894f6431d25.pdfIn PDF document text
    • https://wizisenax.weebly.com/uploads/1/3/4/3/134320615/2eac9a2.pdfIn PDF document text
    • https://nimorozidu.weebly.com/uploads/1/3/4/3/134373006/tegis.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/lazekazatulemofun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5f890f3fcb696.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5f884046e4d34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410015/normal_5f943aa00a666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f8962a8a3839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369187/normal_5f98e1bbd4cec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369524/normal_5f88cbcff1c11.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/3f09a1ae-fc73-42a3-8528-8ab0b0153403/86958646165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1efdcb85-431e-407a-964b-79bb65c47426/xosakepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/723e2731-4b1a-42f3-a7a0-f205d6ccc726/gepej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c8926e-20b7-4223-913f-3978b5c2bb63/guxiwapemapeletefera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4703493-79e2-40b0-afd5-034fccb4461b/562494458.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_off0000637f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637F 5064 bytes
SHA-256: 1c5dfe10527dc87af9ddc7c2f2bf24297392f43aaf64c099d1abd2dcbb253f58
font_01_sfnt_off000074d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D9 11600 bytes
SHA-256: 19f8bb294337520d9e2fb31d8f648ac321ca6b42b8f06757be82b83707ebe156

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