Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b2e1e96db56e29…

MALICIOUS

PDF

58.6 KB Created: 2020-10-13 22:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 638f9bc78d1d44c84133899bc677ad18 SHA-1: f00605cdb240993aa8c8437fb92c85d909b72976 SHA-256: 71b2e1e96db56e29ec6b3ee0113449d0d235bddf64298a4bcd9982a6815edcc2
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, directing users to a URL that appears to be a malicious redirector. The embedded URL, 'https://gettraff.ru/strik?keyword=descargar+mejor+reproductor+de+video+apk', is designed to lure users into downloading potentially harmful content by masquerading as a video player download. The document's structure and numerous external links suggest an attempt to manipulate search engine results or distribute malware indirectly.

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/strik?keyword=descargar+mejor+reproductor+de+video+apk In PDF document text
    • https://site-1039765.mozfiles.com/files/1039765/10568854901.pdfIn PDF document text
    • https://site-1039672.mozfiles.com/files/1039672/71806199934.pdfIn PDF document text
    • https://site-1037035.mozfiles.com/files/1037035/75671835368.pdfIn PDF document text
    • https://site-1041498.mozfiles.com/files/1041498/pidekimuboresewozumu.pdfIn PDF document text
    • https://site-1038916.mozfiles.com/files/1038916/55475266972.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/038885c85ecf8f0.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/d1ee3c84.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/6497588.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/4918653.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/2697538.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/8c0be4c5-c39a-4f03-ae5b-866b639ed29b/51329244315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d11fd34-3315-453e-8562-c499796ef6c5/89442642435.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f49652e2-5dbb-482d-9e0c-30162056e7bf/xepalesalorinolitez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbcd161d-1b89-4ea0-91da-0be994469588/91005990599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c70b697-3922-4f51-b6c2-8a2af0401b09/9953993612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f479b1-93ef-44c6-862a-21c399e896ae/vunolobukopuzupuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72e5fece-aa9c-4008-a69e-e3b53134e95b/27554060185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1dfb2a1-1871-4bed-b820-c33931f31b79/19812886051.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b835a380-41d2-49dc-b61b-b36252fb0420/nomivejuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/816bebef-ee61-4fff-b273-7b68ed23572f/12550852104.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9374 5336 bytes
SHA-256: 9fd3fdca21cd81699ef3f841995a030f2b5d155007ef6c314602504bb6581fb1
font_01_sfnt_off0000a5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5AD 11988 bytes
SHA-256: d941fa846d2cfa9c1f721af6f299968d4ea9ba8c4a09edf595a1b302477f1ddb
font_02_sfnt_off0000ccaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAF 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176