Malicious PDF — malware analysis report

Static analysis result for SHA-256 2274c5f52b7d7270…

MALICIOUS

PDF

70.0 KB Created: 2020-11-17 05:08:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cf323805139be7c4a4584418ea084f5e SHA-1: b441debfee1fd4eaabdb1a52f0486de1e590879f SHA-256: 2274c5f52b7d7270cc12c67b149dfff0c08bbdde8ad5c927879495563ec84d8c
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://cctraff.ru/123?utm_term=de+minimis+safe+harbor+election+2020' is identified as a malicious redirector. This suggests the document is designed to lure users to malicious sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/123?utm_term=de+minimis+safe+harbor+election+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_5f98df1e358b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385235/normal_5f9081f80fa72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5f9a49d77dd06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375708/normal_5fb2fab7236af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462354/normal_5fa1dbf069211.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/janodojivi/zojum.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/12620560699.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccf1a73f-c313-4437-8243-15964b04047a/hot_chocolate_run_des_moines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b19ea7-d02c-4f0f-8532-16a0681b6384/3950783783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f395be2b-d7bd-4dcd-b6fe-2356d2ce7f67/roxituxeza.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/how_to_add_and_subtract_radicals_khan_academy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eda6ece-2713-42c0-a611-d5e924ed3feb/waluzudu.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_off0000d360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD360 5532 bytes
SHA-256: 9637cabf408b7949816d5d0a342c2e83843ce0396019157d3b2517bd6aac7cd1
font_01_sfnt_off0000e60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60B 10980 bytes
SHA-256: 5268a83cccedfc29f232df3174a118ee0464114112912165a76a8c0c81db163f

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