Malicious PDF — malware analysis report

Static analysis result for SHA-256 496fd1ef80f4b78e…

MALICIOUS

PDF

42.3 KB Created: 2020-10-31 21:29:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5466e8c808e22de60ff93f9dab087625 SHA-1: dd97c73bd7414ba946a1aacf12aff5f3a0b2551c SHA-256: 496fd1ef80f4b78e0a29aa56bfcc30e9f3452053dbf96c878a9b3bc6e299dba1
102 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 an urgency-based 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=marieb+laboratory+manual+for+anatomy+%2526+physiology In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393186/normal_5f91253becbbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f9d184a9e96d.pdfIn PDF document text
    • https://jomunibudax.weebly.com/uploads/1/3/4/3/134342604/sisimegakoniko_liperefeka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_5f8fd7f54fff8.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/6068010.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/1/0433/5009/8078/files/revowukudifaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3244/2557/files/exotic_food_dishes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30cab2be-735b-4a0d-9367-10020671ba63/jusofogijozawajux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9815b2f-81e5-4eb1-a84a-09babaf2a820/51689029819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29a231d7-6bd6-4195-a3b4-281b99b98d60/68944569834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0985fbc-3a38-4644-b739-2608d7eb5851/eurydice_sarah_ruhl.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_off000066f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F6 4980 bytes
SHA-256: 5d818715bdf37ac9175a037ab8b9bf52a64ec6f3b56d02566ff3c08bf427bd42
font_01_sfnt_off000077eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77EB 10676 bytes
SHA-256: ceb594cad954014c12173a39ce1f2a57a5eb9c05fe081e5427fba52e829cfa49