Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ea84897b3e488c…

MALICIOUS

PDF

48.3 KB Created: 2020-10-08 02:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b68becce974db653d4f06a41add764c8 SHA-1: e0d8e08bd758cd47ccb105588656df779c703a8b SHA-256: 70ea84897b3e488c252fad0bff2b74beb2e965cc6484046f33d67ed75bf5de2f
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF files, suggesting a link farm or redirection scheme. The ML classifier strongly indicates maliciousness, supporting the conclusion that this document is designed to lead users to harmful sites.

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://gettraff.ru/strik?keyword=brene+brown+call+to+courage+torrent In PDF document text
    • https://site-1036626.mozfiles.com/files/1036626/bobamavelezel.pdfIn PDF document text
    • https://site-1040892.mozfiles.com/files/1040892/40243190249.pdfIn PDF document text
    • https://site-1039319.mozfiles.com/files/1039319/xufaro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0403/7790/files/karexejil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1832/4632/files/kumifisezeravatarotinul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5591/2862/files/rejonuwudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1449/4614/files/xiweguvuvitegal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3095/7208/files/werelinusimijavaxun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1404/4323/files/oedipus_antigone_greek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf591dd-67ec-4730-8d79-746087aa24d1/gifurujibiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d526d3f6-2a23-42cc-964a-5c6e4cc42015/kixewotuxonaruragebesugek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf2fcb8f-bd4e-406b-8907-58b0731895f5/48224629515.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_off00007d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D12 5068 bytes
SHA-256: 3c2c98d05f842b7b28c981e3b74fff0adc4ec91842e26260ba84b2bceda2d55f
font_01_sfnt_off00008e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E78 11228 bytes
SHA-256: 0e5e1894569de5be4b9c1cb554e6e977f0e785fbc3ae31b939769bcb84320ccc

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