Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c8a58a04caffa4…

MALICIOUS

PDF

42.5 KB Created: 2020-10-16 20:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3f36427b361abb83a964ebc8f081a6eb SHA-1: b7590bbddff44a234533ec2fdd8f030e758ba070 SHA-256: a1c8a58a04caffa427e9ad4cf41bebaf95a67a3081b38a28110db9808e0dab7e
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.ru/123?keyword=vacuna+tdap+para+embarazadas+pdf In PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/8562426.pdfIn PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/wumiwoje-tiname-gawapavovokades-diwasilejokiw.pdfIn PDF document text
    • https://jumuwubugunitus.weebly.com/uploads/1/3/1/0/131070493/4b5dd.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bewoti.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/biratamisovogi.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/motoxiroru_fovalin.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/1/0486/1860/2656/files/your_mama_dont_dance_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0485/2381/files/85118919591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5747/0872/files/64249892353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3412abee-4bc2-41d4-b7c0-14b72674b868/46015899653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41f18c40-05e3-41e4-8c3b-abf69a0c4a9a/6814313992.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a36e0bdb-3fcb-479b-b508-4159d6a51c92/86199953603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fbf02e5-d7e3-451f-a3bf-999d5f51f66f/72733115418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d62c8caa-ec87-41fc-b3dc-2dfaf60afd68/79537421278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20207be5-277c-42c3-9e7b-b949bad4fa06/41036579926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/112a14b4-e89c-482e-8341-4091b6512216/12994881076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e0680d-68f9-41a6-a511-8eccf9c14ccc/1885593813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdf5f725-fe35-4985-a2e2-7c1119a6cfcc/samufomofomazokogi.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_off000063ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AC 5424 bytes
SHA-256: 5e62c07b17add2ed6f97290661b02fd7bdb61b113d7c7a1e1f72d3efb38652a0
font_01_sfnt_off00007605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7605 11464 bytes
SHA-256: c35ee81d657e0ee72739f2b3d549c1163b060ccf42ba87d3e696cf6a66618139

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