Malicious PDF — malware analysis report

Heuristics 8

• 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.
• PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
  PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
• Security software disable instruction high SE_SECURITY_BYPASS
  Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
• Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
  Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
• 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/pify?keyword=descargar+tether+unlocker+apk In PDF document text

  • http://nerujasiw.katetobin.com/uploads/1/3/1/4/131437046/5294372.pdfIn PDF document text
  • http://fisodijo.jrwholesalespr.com/uploads/1/3/2/7/132710714/xotomopomefepe.pdfIn PDF document text
  • http://dupowebof.atouchofsilver2.com/uploads/1/3/0/8/130873946/97890.pdfIn PDF document text
  • http://files.whynotusmarketing.com/uploads/1/3/2/6/132682882/jaxumep.pdfIn PDF document text
  • http://files.aspenergonomicswellnesssolution.com/uploads/1/3/2/7/132740978/3337363.pdfIn PDF document text
  • http://files.shannondrhodes.com/uploads/1/3/0/8/130873907/1944747.pdfIn PDF document text
  • http://mulevabur.littlesilverems.com/uploads/1/3/2/8/132814343/917bec808009.pdfIn PDF document text
  • http://files.holbrooktackwesternstore.com/uploads/1/3/0/9/130969655/c59e66da.pdfIn PDF document text
  • http://dowasime.ccpdiscoveryschool.com/uploads/1/3/1/6/131606490/fedawosorolib.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/5fd98d28-b2c4-4db4-b75a-9ab4bd4d3318/lekenogapedatefali.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/70cde606-b760-48bc-bac6-75001ce01b42/fumofukuxerefa.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/8ea1ff19-070a-44bb-a6b6-4e1a23895206/laxax.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/0f98db08-be31-47cd-bbff-073ef3390f6e/sapamasosugimerakiwofenot.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/bf1c8fc5-1309-44e1-9ca4-cd6086692024/45292687374.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/ab96d1e5-27f8-4008-be0d-b9e02d4da0df/89171170632.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/3cdbea34-3860-4761-88b4-31640f1b53d8/22747592023.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

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