Malicious PDF — malware analysis report

Static analysis result for SHA-256 94dca54bd06b2dc5…

MALICIOUS

PDF

49.2 KB Created: 2020-10-15 15:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0222f865ea856e7c3ad98a918ce9142e SHA-1: e98caa1821eae6324cf068090e05087d67602498 SHA-256: 94dca54bd06b2dc542b58e1b3bf4ae1cb5f18539f46bad329b0c54fc30c7092d
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though obfuscated, contains text related to a product search term, suggesting a lure to drive traffic to malicious infrastructure. The presence of embedded links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/123?keyword=3m+6200+half+face+mask+pdf In PDF document text
    • https://site-1036907.mozfiles.com/files/1036907/19198447421.pdfIn PDF document text
    • https://site-1038954.mozfiles.com/files/1038954/nikijasajufafavut.pdfIn PDF document text
    • https://site-1040376.mozfiles.com/files/1040376/89465368708.pdfIn PDF document text
    • https://site-1036729.mozfiles.com/files/1036729/68940880354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_5f874eb401dd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f8723ebdc82e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f8708e1c16f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f87129e650a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f86fec5c585d.pdfIn PDF document text
    • https://site-1040509.mozfiles.com/files/1040509/nokabadosunopo.pdfIn PDF document text
    • https://site-1037019.mozfiles.com/files/1037019/31116325185.pdfIn PDF document text
    • https://site-1038904.mozfiles.com/files/1038904/47096186667.pdfIn PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/tamivafalirifox.pdfIn PDF document text
    • https://site-1040388.mozfiles.com/files/1040388/57781381784.pdfIn PDF document text
    • https://site-1048535.mozfiles.com/files/1048535/7288716983.pdfIn PDF document text
    • https://site-1043328.mozfiles.com/files/1043328/wokozuwojuramipak.pdfIn PDF document text
    • https://site-1036760.mozfiles.com/files/1036760/97844109385.pdfIn PDF document text
    • https://site-1040242.mozfiles.com/files/1040242/31764145556.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/1/0504/3034/5403/files/how_to_generate_from_html_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/8107/7414/files/christ_renews_his_parish_retreat_letters_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1207/4915/files/vejejibozigatonarewigumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d9ff8b-7ace-4fc6-8c3b-1e9d0dc1bdb1/24846740963.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f96e96d-97ea-4c6f-a8ad-e7fc6844c6b1/bosaribadomudafa.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_off00008148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8148 5860 bytes
SHA-256: 2cc3b3fd50cbe4f98e11aa8cc211ae6bdc3d7fce8b4bc28f6d12a4f71d2af7a5
font_01_sfnt_off0000950a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x950A 10144 bytes
SHA-256: 361d97be398aa181571e2669042112239a25df58324e332f93396e3eb32f7b50