Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4ac24f302a20349…

MALICIOUS

PDF

57.7 KB Created: 2020-11-03 15:59:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 94db8d6096fef81ba02e7a9546a8d251 SHA-1: e7dfd79cd8e0c631ca3d5bf39b4f35d8d6c45b07 SHA-256: c4ac24f302a2034968d0a0cfa12f6946f8291295fe043f510c0ab151b06d9e25
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ggtraff.ru/strik?keyword=oracion+ave+maria+letra'. The ML classifier also flagged this PDF with high confidence. The document body contains obfuscated text and the malicious URL, suggesting an attempt to lure the user to a harmful site, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ggtraff.ru/strik?keyword=oracion+ave+maria+letra In PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/mowidapixuj_wudazizowogawi_xujonasimitis_ruwelabopome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418579/normal_5f9648d38cec3.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/zonunugezi.pdfIn PDF document text
    • https://fijateri.weebly.com/uploads/1/3/4/3/134371572/jeremoj-tosamibi-mipuxeketuluga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f8754b0451b2.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/2f8dd0c8-457d-42a7-b1b7-f457c68b484a/base64_to_file_javascript.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0afd8414-a0c8-4d79-890c-d5d76b5feab0/tarihin_pusulas_2018_konu_anlatml.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/663514ed-3fa8-40e5-92ea-4d6a801b44fd/mike_shadow_i_paid_for_it_hacked.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/honda_gx25_tiller_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/lukude.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/kegusomipavi.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_off000064d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D0 17260 bytes
SHA-256: 4dfa4c300fd83a51236a7612e979c7be30e988f9473ccbca6f93e38e426b2cde
font_01_sfnt_off00009b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B92 4856 bytes
SHA-256: b11bac67b5b72d9c66133cc08f5f8d763677b9d2716bf27f10d4eaf29b16351d
font_02_sfnt_off0000ac02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC02 15168 bytes
SHA-256: e33135b04c142d8318d63cba5a2897566b8202cb975e436750c305445590decc