Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1e2c8287ad927f7…

MALICIOUS

PDF

42.7 KB Created: 2020-11-08 02:09:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2904762530bf2552ba65c73447ff7977 SHA-1: 16c1d8ce1fc930b82a5ced7439d14dc92af9e81b SHA-256: f1e2c8287ad927f71e9f84a227f53a11af86cb6affef8d507036493e28e411d0
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file functions as a link farm, containing numerous embedded URLs that point to other PDF documents. One of these URLs, https://gettraff.ru/aws?keyword=kurt+aland+synopsis+of+the+four+gospels+pdf, is identified as a known malicious redirector. The document's structure and the presence of malicious links suggest it is part of a phishing or malware distribution scheme, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?keyword=kurt+aland+synopsis+of+the+four+gospels+pdf In PDF document text
    • https://dudosixe.weebly.com/uploads/1/3/4/3/134323580/refoduw.pdfIn PDF document text
    • https://ruwopevod.weebly.com/uploads/1/3/1/3/131397973/7833278.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453326/normal_5fa6e4283a69d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/gopiv.pdfIn PDF document text
    • https://navafukowo.files.wordpress.com/2020/11/30806907799.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec359c44-3b17-456f-859f-dea79a2df9de/shellback_certificate_download.pdfIn PDF document text
    • https://bipudez899175850.files.wordpress.com/2020/11/54938814407.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c86234d-fdea-4971-949d-5bccc2c153e0/lejunekawiwinunimiv.pdfIn PDF document text
    • https://zojemadej.files.wordpress.com/2020/11/73587489466.pdfIn PDF document text
    • https://dukitavix.files.wordpress.com/2020/11/joderejavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db53cb9a-f5cc-4e90-8a1d-6593c4bb7e9b/2006_dodge_caliber_srt4_for_sale.pdfIn PDF document text
    • https://jazurefemufu.files.wordpress.com/2020/11/fewudusugodumuzexokudujem.pdfIn PDF document text
    • https://vasukobemuzo.files.wordpress.com/2020/11/68225519059.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_off000067fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FB 5376 bytes
SHA-256: 7fbf7a826181dd08f0365783bf2fdb27fe3fc7415cfcdf0caf63adf651ba1231
font_01_sfnt_off00007a4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4C 10392 bytes
SHA-256: 4de87e5dc171432247b84a3e644b05cca878d2b6359314c8bc426f6abfd06e31

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