Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57703dc65df7e7c…

MALICIOUS

PDF

75.3 KB Created: 2020-12-29 16:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8809ea551373a9b193c161b4d7d37d3f SHA-1: 7634a53cef436f4e205ac8f423d25fe61fa2ccd7 SHA-256: b57703dc65df7e7caa04747f3a3c6529ff73d780a8728f4050aea23753bb73e8
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/wb?keyword=rotation%20control%20android%20apk'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/wb?keyword=rotation%20control%20android%20apk In PDF document text
    • https://static.s123-cdn-static.com/uploads/4384030/normal_5fccdfe49f9c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372987/normal_5fa2411dba878.pdfIn PDF document text
    • https://cdn.sqhk.co/kalijada/hfLhjpz/order_contacts_online_with_unitedhealthcare_insurance.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://s3.amazonaws.com/geradi/39023844260.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d78a45a-da65-400e-8b9c-868fe6a29b23/recep_ivedik_2_oyunu.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/91456018857.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/juvoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/60773010998.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/adverbs_in_english_list.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/60149370108.pdfIn PDF document text
    • https://s3.amazonaws.com/juzalizuvar/bunbury_catholic_college_uniform.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD320 2900 bytes
SHA-256: a28fcc4ba65d8171a55e8b87d646ac5d1dd213f66ab2b0026fd39e5ca5d32d1a
font_01_sfnt_off0000dd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD62 4632 bytes
SHA-256: 94b2f5f77f9009cce167bd11bf2845684639a42628daa0a6c27d6b1cebcbb2ae
font_02_sfnt_off0000ed1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1D 10820 bytes
SHA-256: 843ba6658aa9e3cb1913ad53e0021df85b2dbc0147a2b94f444d1a642d2eccd3
font_03_sfnt_off00011212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11212 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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