Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7ffd9af0baba5a…

MALICIOUS

PDF

51.5 KB Created: 2020-11-05 20:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ffd2422a13658c51389d2f6c114dfdc7 SHA-1: 1501bc73eb674787eb4874cb5bc77c24d4e1d1a6 SHA-256: ec7ffd9af0baba5a587bdc25739705e1b6b1de16ee489fbb997895b0259a0e07
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/123?keyword=gt+i9100t+rom In PDF document text
    • https://jerewetazawupej.weebly.com/uploads/1/3/4/3/134384555/dudonedajowa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383314/normal_5f93f1e2ee24b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_5f9bb248d0102.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/42cc83f6-0344-4a2f-9552-3f92646485d9/goxapo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a9487b-8404-472e-bf27-10311b0172e0/monsta_x_the_connect_dejavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6369a2f7-7e27-4956-805b-f3e6edecd377/mansfeld_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/lagabibuzasekeligezekod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9b2b18c-80ce-4be9-9a36-7e1dad78d493/lilovuturufutetuzariju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb372dea-9d2f-4c6f-bcf0-c6cf4d4d52e0/44021166630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5806d549-5df7-4dcb-949a-0acbfc43cb7b/88254401307.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72DE 2996 bytes
SHA-256: 58040034d9a45eb7810115ed172137aa9faa5085280ca3a3fc2fae4323186e5b
font_01_sfnt_off00007d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9C 4356 bytes
SHA-256: 17c7ec44722cca6d11c1a77e29d5566db01749c05539cd273f289405710ab000
font_02_sfnt_off00008c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C63 11400 bytes
SHA-256: a17c6eebe6d744c41a10db3ecbae9ec3964f7c1e3c359e50ba6c869e2cf55d35
font_03_sfnt_off0000b337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB337 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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