Malicious PDF — malware analysis report

Static analysis result for SHA-256 67b3a59d051e0a0b…

MALICIOUS

PDF

43.1 KB Created: 2020-10-11 18:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 140521881731adecb38fbcf8e5648e41 SHA-1: 31391fb34c8ea35fa86c8adbd473c71e97a68220 SHA-256: 67b3a59d051e0a0b6db80d681a3e8d0ef0973812be4b80e6d58f215d351fae9a
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?keyword=life+is+strange+report+nathan'. This indicates the document is likely a lure to redirect users to a malicious website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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://gettraff.ru/strik?keyword=life+is+strange+report+nathan In PDF document text
    • http://bunasir.calderawildscapes.org/uploads/1/3/1/4/131406412/konoti-sobefanegusew-dujejeru.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/164c6b3d-06e9-4a1e-9647-abd960c3072c/50822800614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a6389cb-7530-4ff2-b620-3fcde4ab779c/lilibiziduvezewoxubarezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79339d10-a84e-42d8-bdb3-62285456bc7e/gowuxekojexiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ffd95b7-0a05-4dae-a202-ffad853cb34a/xakavizowusovoxafonog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d2b1bd0-bc8c-4095-922e-aa860ff57c8c/womikefek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9121/3980/files/51448698733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2435/3960/files/jazupidupopagovi.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_off00005dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFB 4860 bytes
SHA-256: 364ac5db7d33e3fe490bca9e98d3226544e58f69e2d641fa902eacf60009a9db
font_01_sfnt_off00006e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6F 10420 bytes
SHA-256: 84e1e306e7e5255429ea7e01865e5ed8505dc833f8ca972ed52c27dcb5fff002
font_02_sfnt_off0000920a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x920A 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2