Malicious PDF — malware analysis report

Static analysis result for SHA-256 04bd0c20928c6656…

MALICIOUS

PDF

38.9 KB Created: 2020-11-02 00:02:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3516bec7d765877bdf9e39b7f1f8ebf5 SHA-1: 1d907bebe7f74b2ff6c5bf058b16d76234b43c14 SHA-256: 04bd0c20928c6656d8722a65601c97bf1b5eb530b7f53afc06e097053fb3d925
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL, https://ttraff.ru/123?keyword=electrolux+ergorapido+ultra+manual, is the primary indicator of malicious intent, likely serving as a lure for phishing or to download a secondary payload.

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://ttraff.ru/123?keyword=electrolux+ergorapido+ultra+manual
    • https://cdn-cms.f-static.net/uploads/4392868/normal_5f9f2c68840b6.pdf
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f9067470d825.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a8514de1-e588-41bf-b9dd-a26e9d6c063a/17187686951.pdf
    • https://uploads.strikinglycdn.com/files/04c53fa1-7a7c-48d8-afba-ad07f8ed3677/ponusolajivafaju.pdf
    • https://s3.amazonaws.com/dinisemowoge/25201391962.pdf
    • https://s3.amazonaws.com/kevava/2018_calendar_with_week_numbers.pdf
    • https://s3.amazonaws.com/rekibedafowow/42098681508.pdf
    • https://uploads.strikinglycdn.com/files/9a2a5e8d-cbb1-40b6-86c1-4571320983b2/17393581676.pdf
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/nomikeludawu.pdf
    • https://cdn.shopify.com/s/files/1/0505/8353/5781/files/tinivipibokupuzakewegu.pdf
    • https://uploads.strikinglycdn.com/files/a5a589bb-e340-4a18-8cc4-a3aa9f61ae55/28835381425.pdf
    • https://cdn.shopify.com/s/files/1/0439/2825/6680/files/4303855329.pdf
    • https://s3.amazonaws.com/lebaxa/employment_contract_for_sales_representative.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005703.bin
930f239bc0d9403fe3d5f90fcd30f70b475b680ff95fe5d7ad0d2b9621907058		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5703 5240 bytes
font_01_sfnt_off000068c8.bin
ef35a0d7c36558da167d19dfb83b52ccfbfa8398d096167bc616e323b3c04d0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C8 11272 bytes

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