Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9e0dfcfbef0573…

MALICIOUS

PDF

35.9 KB Created: 2020-10-02 06:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bb1beba9cf2b061d0acdc6486485e800 SHA-1: a6464c4c40907ecb6ac62dda34877250ec6287d0 SHA-256: eb9e0dfcfbef0573c19000f9f9992be59c08d09901b7cf3d05dddb8c60cf8996
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, with several pointing to known malicious redirector infrastructure and link farms. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the URL 'https://ggtraff.ru/strik?keyword=emitra+rate+list+pdf+2020' and other PDF links, suggesting a phishing or malware distribution campaign.

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://ggtraff.ru/strik?keyword=emitra+rate+list+pdf+2020 In PDF document text
    • http://files.shopstlentertainment.com/uploads/1/3/1/8/131871816/vukitomadazilef_baduximafa.pdfIn PDF document text
    • http://bonutil.georgiasfossils.com/uploads/1/3/1/3/131379803/16843065924becd.pdfIn PDF document text
    • http://files.voiceinthewood.com/uploads/1/3/2/6/132681891/e3c0f362a.pdfIn PDF document text
    • http://zuxutorur.thymeforyounutrition.com/uploads/1/3/1/0/131071277/losozizijezuri.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/9bf4d5dc-f548-434e-9a6c-1f52a6f95807/70373659870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85cf22cb-d786-475f-a309-15ae90ae6888/morusovunubawipusobot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7f8a0d-fa94-4d9e-928d-4e2711c71bc2/bidozuzemigir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/365b212c-33ed-433d-81c3-e67131392242/mojezewofis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e71d2f-b960-4b52-b7a6-25ca1e5f4ebc/bujedet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/616edcf1-efed-4229-9976-45a674631cc5/mitigokubixos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd898a68-0639-49a0-b3cd-f05686a004ab/felituwezalofidenugejome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d40fdd-817d-4e8d-a1a2-3b570abb7c54/90710478744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a3a4a6d-71ea-4e76-86b4-1e04f524af1d/rifebuzuxelozaxekijuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a86fd80c-72d1-4134-bc7e-c28feb541a91/fojutakasonotapalanixosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c34ea90f-dc88-4ea0-9ac0-ecd75f4d36c3/34900907335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e44a4cb1-063c-425c-8055-0584e58920bc/36897377222.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_off00004f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5C 5420 bytes
SHA-256: 66201485ff970e790fa188467694c93f0dd5cf149467fcc129c6f195b9340ca0
font_01_sfnt_off000061af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AF 9656 bytes
SHA-256: 3577780d075af1cf19606bc222f43f844119d5d87a7a625eaafbd251bebef180

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