Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34589f028d0dd7c…

MALICIOUS

PDF

69.6 KB Created: 2020-11-20 09:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6814635b151e47ddd1271ef76b30e3d7 SHA-1: 10ef2a8ab99a1bf5f498479374098e4743d348c4 SHA-256: a34589f028d0dd7cc72c159dffd69996c2626686d35abd0c47089cb313a26235
170 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. Additional heuristics indicate urgency and a call-to-action lure, suggesting a phishing or malware delivery attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffine.ru/aws?utm_term=8d+audio+converter In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388827/normal_5faff6c492ece.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_5f9f24995a74a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451217/normal_5fb5635f4a76e.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/201e4fcd-0e3f-458c-81ab-5204d927b8cf/51737448958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/262e5c7d-df19-4418-88d3-f9a9ef9c153d/roravaxizoled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c296aefc-9e50-4d45-afdc-c140016789a1/68323286366.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/body_parts_worksheet_for_nursery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ccb1d78-f662-4854-8251-38d853d133ec/1613505372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd64513-d3cd-4e42-b24f-f8a1efb2a78b/fundamentals_of_acoustics_4th_editio.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/fodovivuzonawoveveja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/188d4a54-f98c-4135-a18a-63c3d2a84fed/mortal_kombat_vs_dc_universe_game_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62f8680d-1483-433a-ba5a-7aa026b69cc8/industrializacion_de_produtos_carnic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea68052-678b-40fd-8b3f-4ecd41d4a916/morfologia_humana.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_off0000d597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD597 4880 bytes
SHA-256: 80e5086adf92e4ca89a9ec98cc605ff24b3d604e743f65da78dfc5d3a1bace48
font_01_sfnt_off0000e645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE645 10300 bytes
SHA-256: e8b6ee3861a1ad740661901727b7e9c93e49e35bf15e21eca9405fc7ef1e9a0d

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