Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56f24ebdffd21fe…

MALICIOUS

PDF

44.8 KB Created: 2020-10-29 21:15:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c9667a02ee1b9f87c0934e8e75208b73 SHA-1: 7150769b9b34a1e755ba09e79b8f83129b01f8ef SHA-256: d56f24ebdffd21fe2c82d3ca421b8da97e320ec2fcc736659818d5096c309752
94 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text that suggests it is a technical manual, likely a lure to encourage clicks on the malicious URL. The ML classifier also strongly flagged this PDF as malicious.

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=the+next+generation+technical+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373516/normal_5f8bed9a77bc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384832/normal_5f9491cc7bf6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f88afa696f35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f938adf921ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369509/normal_5f8aa365d63d3.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/1/0477/2777/1804/files/37820550917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38bf313e-cfec-4405-a673-fad486479d03/life_in_a_jar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d49852c-d53d-4de4-bf70-d7f87c94845c/1529288849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2502/8504/files/never_dead_ps3_trophy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ec1589-59b3-4e80-9299-6bfc8576efcf/puresource_3_filter_wf3cb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1845/9546/files/60626075454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0743/3125/files/exporting_bookmarks_chrome_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9c26115-74e2-4172-8c0d-bd80d0760b5a/21124063485.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ce8f45-5564-4d88-b667-5b6bee9950d7/94894847692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8542/8384/files/niloluniguw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba04499-cc78-44e4-941e-73012dd4d5fb/98514373550.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_off00007016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7016 5052 bytes
SHA-256: 1bf872e48a85159d03ecb257981c5084232521dca66d8c5af516cdf3404f84e9
font_01_sfnt_off00008124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8124 10912 bytes
SHA-256: 1d154e8e9bb585c7f3a119d5ea7a86dcbd46358b720e2407c2c0d5b9ce0722db

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