Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22088269cf96bf6…

MALICIOUS

PDF

41.5 KB Created: 2020-10-03 19:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9903a8d4a69a1449c1e177ac82a6fc0a SHA-1: 127382e4158d8e866bc1e6275292fad9f69a251c SHA-256: d22088269cf96bf6fc4b7667cb5a428e87827c54b917c8b1eb68691a9d8cd428
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. The document body, though heavily obfuscated, contains this URL and other URLs that appear to be part of a link farm. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves directing users to a malicious site under the guise of providing a guide.

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=majora%2527s+mask+3ds+all+masks+guide In PDF document text
    • http://darefi.ukiahrifleandpistol.com/uploads/1/3/1/6/131606539/zoluj.pdfIn PDF document text
    • http://files.lesliemcgeaghhypnosis.com/uploads/1/3/0/7/130776607/zavefazo_ralami_wipisiselebusig.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/c900f2db-c5a2-424b-bf7a-82c54cf8560d/31061756335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d25fe0b-0307-4b49-a368-b5293c9d2b7a/38558569138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9f303c-a06d-4025-80a5-4db46923569b/xizeja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d776b62-5d5e-4643-b260-c311a12e8ccc/segupopurijeludot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb84ea9d-a02b-4c73-a620-177bd18427e4/geporapubesasomibogijari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4138/0769/files/dekalb_county_alabama_jail_address.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/lezuripibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1665/3470/files/proform_zt6a_treadmill.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0968/9765/files/the_lords_labyrinth_chamber_of_sins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3830/1594/files/radiologic_science_for_technologists_workbook_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/2606/6851/files/23355314008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5122/1146/files/jenubisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4505/9222/files/mitosis_and_meiosis_worksheet.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_off0000642c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 5488 bytes
SHA-256: df93fa9640ca133df02b057c0ac31c70b8622fcab0efe02922ba8e0a9d566af1
font_01_sfnt_off000076da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DA 10044 bytes
SHA-256: 965f85d1efcba3d0529232de18d97828906de627a48ee8b4e66aaf7d9b14c8b7

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