Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef2ba72516696a6d…

MALICIOUS

PDF

142.8 KB Created: 2020-11-03 19:19:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6e289a4a94a1382787b29879868b895c SHA-1: df77a5f96e267e152270a25bed28e80f2b10433f SHA-256: ef2ba72516696a6df1ecd6b78b77a6e4762549589d1d587fd9b2ca8bd1e10445
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 0.9999

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/123?keyword=taylorsville+elementary+school+grade+3 In PDF document text
    • https://lupexepiw.weebly.com/uploads/1/3/4/3/134318885/furiputatofobuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374021/normal_5fa0167b53cdc.pdfIn PDF document text
    • https://lewejasolon.weebly.com/uploads/1/3/1/4/131437246/df80b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_5f9e1a6d1ce3d.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/e84fc6cf-a0fd-4586-8676-f17a2d96f594/bemij.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/gijetisegaboxorofidugex.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/backyard_discovery_beach_front_wooden_cedar_swing_set_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17953299-130e-47ff-bf1e-ac89801f42e4/30297338761.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d490d30e-c705-48a5-8c01-60f66e2bcd2c/govefejijodif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cffcf0a-e2ff-4e49-8e1e-5aa588280945/lodexuvezapipiwogeken.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/18654240785.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/cushman_truckster_for_sale_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/749dc4ba-b914-4770-acc0-2d92d4dcf8ba/wasupusidilebiveru.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_off0001f53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F53F 5628 bytes
SHA-256: b1b4274671d961522b7ed6b66cfb57f91e9642314da83d5110c12d212d184186
font_01_sfnt_off00020847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20847 11148 bytes
SHA-256: b0fea91b54d5c0043d41cd1b8cd6487aaf75df93b385766781052856c13e9cca

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