Malicious PDF — malware analysis report

Static analysis result for SHA-256 da58b11dd29e4c53…

MALICIOUS

PDF

48.4 KB Created: 2020-10-31 13:26:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 921e25cb00295c1788293f4c4733f240 SHA-1: deb16f2c10c897109717a7170fddb3f0982aa1a0 SHA-256: da58b11dd29e4c53bc4efa4c7383557d425ed8f81be05b90749a84899b38fd89
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.club/123?keyword=guided+reading+history+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408582/normal_5f956d5d49fdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5f8b6f129fad9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f99f73ce4d9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5f8b3f06cd627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5f9324ed7276f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f9154bab000d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2438/2634/files/78473293626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0110/1984/files/mm_trucking_llc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7430/4200/files/garonizixezebofixuvuroxab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2634/9719/files/43782373267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c31d39d-18fa-4df6-ad45-4474d72a2e4a/9651911546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7700/1902/files/midi_guitar_controller_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/6591/4555/files/16565822705.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_off00007e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2C 5280 bytes
SHA-256: 8daeaff3d7bd9d68682b545c8e9282eeeafd5e4de9d34ffb80c967d0fb07d923
font_01_sfnt_off00009030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9030 10796 bytes
SHA-256: 6d4f1dd1b6d23c10e06e187a0019b5fc4b2a9f204d3970878ea364fbe0731457