Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ffbcdf9b17aeb9…

MALICIOUS

PDF

39.9 KB Created: 2020-10-14 10:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: a3117ef10e4363748815f1871d7f2880 SHA-1: 2b638199427754fda618967ed75a1fb7bb182cf7 SHA-256: 32ffbcdf9b17aeb9fbdb3942d3de1a6d7c8b17f75fb8e1071e59e0a55573dc05
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://cctraff.ru/strik?keyword=%25CE%25BC%25CE%25B5%25CF%2584%25CE%25B1%25CF%2584%25CF%2581%25CE%25BF%25CF%2580%25CE%25AE+%25CE%25B1%25CF%2581%25CF%2587%25CE%25B5%25CE%25AF%25CE%25BF%25CF%2585+pdf+%25CF%2583%25CE%25B5+jpg+online In PDF document text
    • https://site-1039698.mozfiles.com/files/1039698/73687834157.pdfIn PDF document text
    • https://site-1038653.mozfiles.com/files/1038653/13496998757.pdfIn PDF document text
    • https://site-1040131.mozfiles.com/files/1040131/renozuw.pdfIn PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/23957978736.pdfIn PDF document text
    • https://site-1040218.mozfiles.com/files/1040218/93349520649.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/xelikanotuzifaja.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dbbd04.pdfIn PDF document text
    • https://site-1039491.mozfiles.com/files/1039491/66455655869.pdfIn PDF document text
    • https://site-1040571.mozfiles.com/files/1040571/muvifugel.pdfIn PDF document text
    • https://site-1039299.mozfiles.com/files/1039299/zopon.pdfIn PDF document text
    • https://site-1042603.mozfiles.com/files/1042603/98968958971.pdfIn PDF document text
    • https://site-1040354.mozfiles.com/files/1040354/22138203365.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/1/0433/6153/4111/files/46238876338.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0565/9296/files/ponopikawatubisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2277/7496/files/silhouette_brand_temporary_tattoo_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/christian_coma_and_anna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3196/5077/files/motefosuwok.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_off00004e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E31 6152 bytes
SHA-256: 4059be5b8a7dfe289b0b9463688cfa7b4171e7cf9e1958834b4de9232c7eb7d1
font_01_sfnt_off00006332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6332 14276 bytes
SHA-256: ebb8b024dcb9103728676eca62526c4f828ba6f50b63020e91284fe728b934ff

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