Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff48536af7afe277…

MALICIOUS

PDF

65.7 KB Created: 2020-10-20 19:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e9cf65ba46bfd0ad50cd68b4aec238e0 SHA-1: a423966717b4e5f750a88547613c2ae36a020d5a SHA-256: ff48536af7afe277575a5aee3135e34f2459d8a5a3bd8955587fee77d1d2608f
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The embedded URL, 'https://cctraff.ru/strik?keyword=teen+wolf+season+5+episode+8', is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains this URL, suggesting it's the intended lure.

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://cctraff.ru/strik?keyword=teen+wolf+season+5+episode+8 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f8732f31fc30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376619/normal_5f8c13dc4b2ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f899847d46b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f8ec4a76a749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5f88a5a503b8a.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/52aad9f3-bfce-4fd9-905f-f8d8831d46c2/gixisavusapijunerifetap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c940721f-6e68-4043-b1d9-c9e391276bdb/posie_chouette_c_est_la_rentre.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/winebuxoselokoxum.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/milili.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/danafanojag.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/mufixi.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/22542770749.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/12706410301.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/37919257153.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/22456278914.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_off0000c198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC198 5296 bytes
SHA-256: e6642515cd6c6c81a4372365086a9b0e9a0422b462e26011b12a905d7d8f75ea
font_01_sfnt_off0000d3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CE 11128 bytes
SHA-256: 6c7ddb78b45141dad7642321e52eb001e9e9ac29d030d4a0d537cb9d9d346480

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