Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3b2dce2c3e1d52…

MALICIOUS

PDF

34.6 KB Created: 2020-10-02 20:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f297a63504e72195609506a5d6213207 SHA-1: dc295278062cd8e785a5a3639a34d55b08241785 SHA-256: ee3b2dce2c3e1d528c10bd367d3e150cc841490d661f93edf3c8c7727d0355eb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by a machine learning classifier and contains a significant number of external links, many of which point to a redirector infrastructure. The primary malicious URL identified is 'https://gettraff.ru/strik?keyword=clarinet+finger+chart', which is likely used to distribute further malicious content or phishing pages. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure.

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://gettraff.ru/strik?keyword=clarinet+finger+chart In PDF document text
    • http://files.iflowfephase.info/uploads/1/3/1/3/131382673/2584284.pdfIn PDF document text
    • http://zevadubu.inouishop.com/uploads/1/3/1/8/131858530/4015541.pdfIn PDF document text
    • http://files.brandonautenmusic.com/uploads/1/3/2/3/132303009/2094009.pdfIn PDF document text
    • http://nejaregiz.40yearsofbillduke.com/uploads/1/3/0/8/130814347/7da94aabce318.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/c202d4e3-f437-4de8-b902-459e1507de33/xunasikawezirubasarixujid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35b47cf6-141e-4924-8040-c9c8904bc3f8/mukele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f56b8171-c9ac-47c9-87b9-d49f9be713ab/bejulewofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86771dad-a5cc-416f-b246-6cd63d0e587e/bifiraxub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/832e91fc-eba2-4fb4-b28a-30ea248c1600/fomozumaxezunakibadorew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bbc0a4c-1306-4a5d-acc1-a3525f98ff06/97905798368.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/612ad7b3-0f00-4f3b-9479-af949cde3aa1/35833403529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c37cb15e-d89f-4379-9bde-16c4f2d276d4/67971414692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2444b2a-88f3-41d6-873e-f0132dceb17d/ziziniwalemagaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e65cdb34-96ac-4e4e-a5a1-b5475d64980e/54197284943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/519d0769-12e3-4dbe-81e4-a0445f11ac29/gufituvu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20dcf0ff-8872-4095-b922-9d8d78a133b4/folig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5935a814-3e61-46a3-ad9c-4a0d76f8167f/jarigamufigujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc670140-45ed-4d05-beaa-cf5b83ab9e37/78517049839.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_off00004bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BCA 4872 bytes
SHA-256: 3254f344ce743ddc3a60dccb507a909201c8d6c513206a1da9aa225ba2afe0a8
font_01_sfnt_off00005c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C58 9728 bytes
SHA-256: 286fa67b3440a3d14b4067a779a3b320814f09e455b11eb89a3217d87a312f93

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