Malicious PDF — malware analysis report

Static analysis result for SHA-256 646943316b88d6d4…

MALICIOUS

PDF

41.1 KB Created: 2020-10-01 10:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a3b4d36f897a89ffcbd02c7e18549f38 SHA-1: ffdfaf58d3ffb69a1b6502af68c685f9364c0559 SHA-256: 646943316b88d6d4f2437907265f1fcf7ff4478794c52d5c1c8ead0038a1a08e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to suspicious domains and are flagged as part of a link farm. One critical heuristic indicates a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that mirrors the suspicious link farm content, suggesting an attempt to disguise malicious activity as legitimate 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 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.
  • 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/strik?keyword=bhakti+movement+in+medieval+india+pdf In PDF document text
    • http://files.iwstreecare.com/uploads/1/3/2/7/132740479/wogupu-zukokitoruwogog-zikezugufada-pubuzesilas.pdfIn PDF document text
    • http://files.mysunfast3200.com/uploads/1/3/1/3/131380739/9410139.pdfIn PDF document text
    • http://files.lukejohnsonart.com/uploads/1/3/1/4/131406234/mabafoju.pdfIn PDF document text
    • http://files.nanba-ryu.com/uploads/1/3/1/3/131398428/d375e2f3.pdfIn PDF document text
    • http://files.ginandtarnish.com/uploads/1/3/1/1/131164439/6234587.pdfIn PDF document text
    • http://wesebado.katieanastas.com/uploads/1/3/1/8/131856543/bataxi.pdfIn PDF document text
    • http://kesarano.rachelbgreene.com/uploads/1/3/1/3/131382406/3542778.pdfIn PDF document text
    • http://files.sandravrozo.com/uploads/1/3/2/6/132683087/324c26.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/1/0432/8371/0117/files/jideda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/99409901924.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1551/9912/files/chrono_cross_rom_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4539/5359/files/black_s_law_dictionary_online_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5672/6170/files/suzif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0682/7428/files/7392261600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/hechos_y_actos_juridicos_concepto_y_clasificacion.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_off00006434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6434 5180 bytes
SHA-256: cdc8619ea68735e99b81096acb3d00bca2a1becf22f80cae83c4483d42fbecc1
font_01_sfnt_off000075bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75BC 9900 bytes
SHA-256: 2d01c433d3dd60f6c4d7d48c0891ced7afbecc22a04bb1f05d92becf7d958071

Open this report in the interactive analyzer, or submit your own file for analysis.