Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc707532d88bad39…

MALICIOUS

PDF

43.5 KB Created: 2020-11-09 15:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 323d5470a6bb3957e10ae4a68eeeff76 SHA-1: 5017d08f4e1a037cbd582204ea8e3b7136422065 SHA-256: dc707532d88bad395c172eb041dce5e55ed9abe16f162653c6b7580380b10583
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://traffine.ru/aws?keyword=el+fruto+del+espiritu'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains this URL, suggesting it's the primary mechanism for luring the user to a malicious site.

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://traffine.ru/aws?keyword=el+fruto+del+espiritu In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_5fa22c2b4a39d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374542/normal_5f8f7387b1233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_5f885f57b7a6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8766263e932.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_5f91a50ac50c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371265/normal_5fa0b424736e0.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/ce5b9fdb-f3c5-47b8-ab06-73aa0bc7cd3e/81279285858.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/raregorafoni.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/double_sided_variable_equations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06a3d9e0-4a97-48c5-9fae-cc779dea46c6/junelevanujomufavap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b0d6cef-653a-4bfd-8733-c07eb0d20fe1/breast_cancer_tattoo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de64c795-ebc2-44ad-9873-9573fa04fc0c/mitchell_high_school_tennessee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df86906-94be-47a9-9c43-4463f820e5b9/67186740803.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bec53476-caee-4ec5-8e9b-67367428ce8e/netapp_fas3020_manual.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_off00006b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5D 4784 bytes
SHA-256: 0ca05810bbaee46990836422ade56a8d8ded068ea50263e1b8ba5aa84bdf1f72
font_01_sfnt_off00007bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB4 11240 bytes
SHA-256: 5c167fe9f36cbe5272f67210dbf398bbf74197ef1d321bf4a3e880e52768bcf5

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