Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cfb8d336e815d58…

MALICIOUS

PDF

43.4 KB Created: 2020-10-07 16:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e79d40252a3d359d5c33ff8014c8a6fc SHA-1: 4204fdb94cd9a0f7715b7b496a1ac204769f2994 SHA-256: 9cfb8d336e815d5832da8d233bffde1c307fe1d0506642025a37c09f234f0401
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.club/pify?keyword=spanish+springs+library+today In PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/binejaroxenuxig.pdfIn PDF document text
    • https://site-1037844.mozfiles.com/files/1037844/83144787420.pdfIn PDF document text
    • https://site-1036635.mozfiles.com/files/1036635/87961820898.pdfIn PDF document text
    • http://files.thecramm.com/uploads/1/3/0/7/130776516/8108241.pdfIn PDF document text
    • http://files.predictiv.co.uk/uploads/1/3/0/8/130874090/91cd1b9566ffb1.pdfIn PDF document text
    • http://xutajunu.mattysonmarie.com/uploads/1/3/1/8/131856040/283015.pdfIn PDF document text
    • http://daviv.grandhavenbucsfootball.com/uploads/1/3/1/3/131379225/modases.pdfIn PDF document text
    • http://xajet.mountainbayliving.com/uploads/1/3/0/9/130969521/894087.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/1/0435/0892/4568/files/proceso_de_moldeo_de_metales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1186/1412/files/63825994231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7670/5690/files/honeywell_rth9580wf_manual.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_off00005f17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F17 5568 bytes
SHA-256: 17a79dec12652aed0ddb82d6640d81876270091ca3fa4d8d05f863c0146fb69d
font_01_sfnt_off000071f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F7 14632 bytes
SHA-256: ac6f1215482eb676055d18113a3a3256c6f42d85d5c1768a37dd73aa944c7fed