Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a05c7c5f7ab9b13…

MALICIOUS

PDF

44.3 KB Created: 2020-10-04 16:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1ab9aee77a741e75ab6b33fe9409e99e SHA-1: 55dff3b81567ec528e6a72ec77f94955ebb10a7a SHA-256: 4a05c7c5f7ab9b13da562ad0ac4e93cb238ba54fbe747e4569d801498e951faf
184 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded URLs. Several heuristics indicate it functions as a link farm, with many URLs pointing to redirectors and disposable hosting, suggesting a tactic to manipulate search engine results or direct users to malicious sites. The presence of a known malicious redirector URL further supports this assessment.

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/pify?keyword=levanti%2527s+italian+restaurant+sam+waitress In PDF document text
    • http://files.scottsawa.com/uploads/1/3/1/4/131483002/kapenajifafo.pdfIn PDF document text
    • http://denufeko.levelbossgames.com/uploads/1/3/1/3/131380429/defoba.pdfIn PDF document text
    • http://files.caravel.org/uploads/1/3/1/3/131384286/pimudol.pdfIn PDF document text
    • http://buwaviji.shamansinger.com/uploads/1/3/1/6/131637255/semebo.pdfIn PDF document text
    • http://momajinav.tiffanycrowhurst.com/uploads/1/3/1/3/131398008/posiwumegomomu.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/98138044080.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/24605863384.pdfIn PDF document text
    • https://site-1036850.mozfiles.com/files/1036850/jebemamifiwesazir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/331f2cb4-6192-4b4b-8f4d-0f99b45dedec/bufisigovipojivakevunoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/239a396f-f885-486d-a90a-54a997ad48db/seteroboge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb3504a-88fc-4c67-a3f4-85f084347886/32225186388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d6bd304-1ccd-44ca-9cf9-38eb6e3fd006/desamemomivibenusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2967e63a-e5cc-4f78-8949-bbdd659be898/sojud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93edca3b-54e7-4b15-b71b-202212d666ac/nevarasefotodefanuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd09e69-9724-4900-823e-51850a9a7c81/72885787984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b47ccc8-3d76-4492-933e-c75ca5f808d9/90486808545.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AB 4732 bytes
SHA-256: 282b2da81d3662f069051cee8515a6b656836b60ab2f79db7c794a4ea024ae5e
font_01_sfnt_off000072b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B1 10332 bytes
SHA-256: adf6606de1fd799414d295c15d3f978a41d713b5cd3909baea16b093f0e558be
font_02_sfnt_off000095fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95FE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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