Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b24eb55597eefc3…

MALICIOUS

PDF

49.0 KB Created: 2020-10-04 02:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d1cad0fc3bed3ef8faf7816ccbb5a36a SHA-1: ddddb098a80dffd53a5a674db92ef93677fd8170 SHA-256: 2b24eb55597eefc391e1f6304f51cfc9b20c9564e020979ab80ede5cdb0b9e3b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a significant number of embedded links, many pointing to external PDF files hosted on various domains. One of the primary links, 'https://ggtraff.ru/strik?keyword=arabesk+sarkilar+mp3+indir', is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document's structure suggests it's designed as a link farm, likely to either distribute malware or engage in SEO manipulation, with the primary malicious URL being the most critical IOC.

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://ggtraff.ru/strik?keyword=arabesk+sarkilar+mp3+indir In PDF document text
    • https://site-1038932.mozfiles.com/files/1038932/mirifolugazino.pdfIn PDF document text
    • http://xuweriwaz.classic-speedometers.com/uploads/1/3/1/3/131380550/2263263.pdfIn PDF document text
    • http://wenemisu.theballlab.com/uploads/1/3/1/3/131380623/makovixe.pdfIn PDF document text
    • http://files.teachermaxwell.com/uploads/1/3/0/8/130814515/18b765a085.pdfIn PDF document text
    • http://files.comfycabinfamily.com/uploads/1/3/1/1/131164168/00285.pdfIn PDF document text
    • http://vuter.boxcarblog.com/uploads/1/3/0/7/130739017/segujarimupitux_gevugobo_negowupadof_soxejato.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/1/0482/8846/5051/files/mutotojagawuparobuporenak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/jotagaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5001/2319/files/gazelle_exercise_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/jigibiluvexexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4423/6183/files/50th_wedding_anniversary_speech_to_parents.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb0592b-280b-457d-8dc6-c59390eefba1/pijedotidomusez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3571775-2faa-4e6b-bbab-98b6866c5227/20872648263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/960afcb2-092d-4d99-9f75-d54c808eb9f1/fazirepujinejeniwutamug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd24f00c-9d8b-4bab-8c1e-3d66d6c48b92/nutogazipozogupenozera.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_off00007e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E43 5464 bytes
SHA-256: 842052431d1967f49f0231d6953e0b3d91581fe7f5127df3daa1a60b2c59443f
font_01_sfnt_off000090b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90B8 11860 bytes
SHA-256: e230696839d2158f6e093d538d39236f885e44698d6ab08c87f92213a26c24ec

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