Malicious PDF — malware analysis report

Static analysis result for SHA-256 6693ce0130559dc1…

MALICIOUS

PDF

65.6 KB Created: 2021-01-12 01:48:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ace50132e86c692a019e2c8448f63698 SHA-1: 77f3c5875a23575f69b93d9b5f717d3c8b9d8da6 SHA-256: 6693ce0130559dc18b12e22bb52c51fe5b82078629cffe420ec9400675fd7758
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The primary link, 'https://gettraff.ru/123?utm_term=valleywood+golf+course+scorecard', is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious websites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=valleywood+golf+course+scorecard In PDF document text
    • https://cdn-cms.f-static.net/uploads/4481420/normal_5fb69629f40f8.pdfIn PDF document text
    • https://cdn.sqhk.co/boketumejipa/jbqidjg/xojalalegajuguxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404123/normal_5fe893f955296.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/fhftNhg/66952649062.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/IIihvEs/ghost_sniper_shooter_contract_killer_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_5fd3943538d3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411916/normal_5fbc9e781a690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388038/normal_5f94228edd42c.pdfIn PDF document text
    • https://jumolemema.weebly.com/uploads/1/3/4/8/134853288/522860.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5fa2ecdad64bc.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/ieSkija/23569446111.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/latufenaw/jinuwewijozemiruwogelabiz.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_off0000c281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC281 5348 bytes
SHA-256: a1c9f9569daa26f12848deac267a169b3c0f4c1821fe9ca4c4437bc356e7b173
font_01_sfnt_off0000d4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E3 10892 bytes
SHA-256: 24e34fe8ca8ad17248360a538b66b61c552bbfdbe1495c33f86d863ef2fa02c6

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