PDF malware analysis — malicious · 4a3fffbbd01d4a72

MALICIOUS

PDF

51.0 KB Created: 2020-10-29 12:58:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02

MD5: eb38b2ad2dce17fd7e9d3a175432c86d SHA-1: d3a60483400f69f13b320e99b6415312b18e2769 SHA-256: 4a3fffbbd01d4a72429ea96851f6d1d3a6f68f13dc42a13a02e9cee9e8203dcd

114 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. It uses a callback-phone (TOAD) lure. 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 4

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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=emergency+and+critical+care+pocket+guide In PDF document text
- https://cdn-cms.f-static.net/uploads/4374699/normal_5f983d9e0ce33.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388038/normal_5f8ef6d06c4e7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4424043/normal_5f985e91df389.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4375353/normal_5f8a1f36633ca.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365638/normal_5f873b758dc5a.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/jebupofedijakuk/helter_skelter_tab.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0439/4916/2654/files/zomowegarelexa.pdfIn PDF document text
- https://s3.amazonaws.com/resixexi/amcor_portable_air_conditioner_hose.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4bbeaf57-722d-4b8c-a5b1-632a3747a4b2/90107371465.pdfIn PDF document text
- https://s3.amazonaws.com/jenagubadopi/the_hindu_tamil_news_paper_free_download_today.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/8258/0130/files/66818052771.pdfIn PDF document text
- https://s3.amazonaws.com/gomakobez/usos_del_aceite_de_ricino.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/627c007c-5c6d-48b5-a190-2fe0ad31646e/28028787241.pdfIn PDF document text
- https://s3.amazonaws.com/posufij/ccna_routing_and_switching_200-_125_book.pdfIn PDF document text
- https://s3.amazonaws.com/zirojopemup/homero_libros.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bdffd02f-cbf7-4463-9456-73e108b457ed/67268209935.pdfIn PDF document text
- https://medlineplus.gov/criticalcare.htmlIn 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.

Filename	Kind	Source	Size
`font_00_sfnt_off00008727.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8727	5340 bytes
SHA-256: `ff83df8f8e7f6567ebe4716fe43866de78e6442afe609339bed8c8b932ec621e`
`font_01_sfnt_off0000994c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x994C	11060 bytes
SHA-256: `4274b713721a74c5db0762b79c84c0ebf98fd92f4569e998636381192ee34bfb`

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