Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d7288b3875a1598…

MALICIOUS

PDF

44.6 KB Created: 2020-10-31 08:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 842a2ef109e7844a463600bcfe4ddd12 SHA-1: dbb35f4fd229308664dde8c6b59a8d7c1d451e60 SHA-256: 8d7288b3875a15984b4e35477fa1dea4cdd231aec4786f419f059a87e7720792
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.cc/123?keyword=priest+bis+enchants+classic+wow In PDF document text
    • https://cdn-cms.f-static.net/uploads/4377407/normal_5f912b4917627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_5f8f1e9f5e3cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413013/normal_5f9a611ec767b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408319/normal_5f9b767885cc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388285/normal_5f996b0f29a29.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/0072a1b2-9c7c-4a42-a0b8-efde11bc71fb/ximejemofaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dbcb1a6-f5e2-4936-9417-9d37b17b9b7b/17688593206.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/17838019224.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/em7_piano_chord.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/ketunerivawaxebaxufepaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/sibenuvokiwuz/why_did_i_get_married_2007_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/penyebab_abortus.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/vidudasuwafexumilozagizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9186/0379/files/lelumu.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_off0000711d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x711D 5120 bytes
SHA-256: 1f594825e59527e6656ed4ffb53fb4438182f54435278e8dec9a3bb6b61a72a9
font_01_sfnt_off00008293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8293 10168 bytes
SHA-256: 4f588e95ee4b1808b2446d223fc14c5ce02264338ae97a93cbe002485eb6dc94