Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b0cf3fb77bb20b…

MALICIOUS

PDF

45.2 KB Created: 2020-10-16 22:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 15c6f0f2508f227ea5bce4e0a7fdf7be SHA-1: 40322ac61b451f1ad7480868078ec368dc4c2da1 SHA-256: a9b0cf3fb77bb20b0bdd0a6926ac1982d24757fb4298d9455c2d9c73069c5fea
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ttraff.me/123?keyword=biomechanics+and+analysis+of+running+gait+pdf In PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/gamigakusujusul.pdfIn PDF document text
    • https://jedunaxalow.weebly.com/uploads/1/3/1/6/131606453/5365052.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bekalan.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/sorelonirijowijejej.pdfIn PDF document text
    • https://xonimitofowe.weebly.com/uploads/1/3/2/6/132682232/2461809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8967cf4c16d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f87623810069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5f899489a0308.pdfIn PDF document text
    • https://wedebiki.weebly.com/uploads/1/3/0/9/130969436/mezaj_tinuzujoni_biniguk.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/wonexuroledezow.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/linurigaruxox.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8324687.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6b0ee57-9778-4132-bf7c-3d4d7ce1f06a/33065710580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff8c7172-a035-4a2d-8169-f169332d8c73/90284273457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9953ee8c-60a1-47a6-a326-9f2503d62098/fepevujuxawudafol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/020e4176-e719-45b2-8cb0-482323584122/vajoboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1111/1579/files/lutovewipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6388/9060/files/motu_patlu_temple_run_game_download_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e715db-ab31-4909-9c88-c8da6d6a6e02/lividofufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c479467-dfd6-40fa-821c-99e556f5eca5/42206453126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ec0cd26-e6d5-4e0e-ac11-31236dedc7b8/silolusarixiwilavetojaw.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_off00007111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7111 5720 bytes
SHA-256: 4dcb727795eb26c1b6ad659795bfaaaa7ece37dd825acd085be812ab949a3933
font_01_sfnt_off0000845d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x845D 10156 bytes
SHA-256: 01a4823beffb30b37d04f2ab7269fbc5854f25c700215eb82b85867116c6557a

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