Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0420234467b0588…

MALICIOUS

PDF

43.5 KB Created: 2020-10-05 01:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 252515b748dae365fd711fd56be7d6ad SHA-1: a7ca34bce4fda61994416d0e3daa966157bab9af SHA-256: a0420234467b0588a4539416024a74c2863039e8c62147d792224eb081aba0d0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, identified as a link farm, with one URL pointing to known malicious redirector infrastructure. The document's primary function appears to be directing users to potentially harmful external sites, possibly for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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://cctraff.ru/strik?keyword=halt%2527s+peril+pdf In PDF document text
    • https://site-1039174.mozfiles.com/files/1039174/lukafinexaga.pdfIn PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/83746371533.pdfIn PDF document text
    • https://site-1037177.mozfiles.com/files/1037177/xopajefexulafijura.pdfIn PDF document text
    • http://files.fnbuilders.net/uploads/1/3/0/7/130739081/riguzapit_rujipaput_puwojegaf.pdfIn PDF document text
    • http://files.gloriousseaglass.com/uploads/1/3/0/7/130775138/5135276.pdfIn PDF document text
    • http://files.silangwaterdistrict.com/uploads/1/3/2/6/132681513/3243869.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/d455711b-b53c-490d-9f7b-238827050759/52335216986.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbd8ba2d-6c87-4f40-990d-b96cf466aff6/81380416893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d720fe2-1b2d-429e-9052-c457988863c9/mawimuto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5252/3929/files/puvisekagiwuwe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6899/7284/files/owl_adaptations_beak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9695/1969/files/adele_houston_presale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/128_oz_in_gallons.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_off00006e3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3D 5032 bytes
SHA-256: ee38ae918bdd0c06db92b0478cf397d3939540d66deba7539ead0d2e44b10e15
font_01_sfnt_off00007f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6C 9992 bytes
SHA-256: 445a508d49ba40044c55c9fe3c69fd3ec3085d1195f7c1b82f84cd35c4d9dc54

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