Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9220b05b6db3d0c…

MALICIOUS

PDF

68.3 KB Created: 2020-12-06 01:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bd8d26d8b92976423059d8f43c275ea SHA-1: 74a5369f9b27c589606acd4920e42d5151e5063e SHA-256: d9220b05b6db3d0c91d06c61a2978dd04766775e840d9659fda2a68ecf58eca0
154 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 'https://gettraff.ru/123?utm_term=lupinus+polyphyllus+russell'. This indicates the document's primary purpose is to lure users to a potentially harmful website. The ML classifier and ClamAV also flagged this PDF as malicious, reinforcing the assessment of its malicious intent.

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=lupinus+polyphyllus+russell
    • https://static.s123-cdn-static.com/uploads/4449629/normal_5fc9ea48aa347.pdf
    • https://cdn-cms.f-static.net/uploads/4419195/normal_5fb9b71f9a00a.pdf
    • https://cdn-cms.f-static.net/uploads/4411480/normal_5f9dc63535e98.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/200d2b8a-572a-4203-b6ea-b7a4877cc551/bloomington_to_indianapolis.pdf
    • https://s3.amazonaws.com/vukusa/channel_7_program_guide_melbourne.pdf
    • https://uploads.strikinglycdn.com/files/0adea8f9-8ecd-4a0a-bd86-9d58ebe9925a/applied_cryptography_protocols_algorithms_and_source_code_in_c_download.pdf
    • https://s3.amazonaws.com/mibiwivanetuj/8165466954.pdf
    • https://uploads.strikinglycdn.com/files/1d20508d-200b-4b96-b8c3-f1b15dbdeb6f/parutobadugupot.pdf
    • https://uploads.strikinglycdn.com/files/fb5f7f04-e026-4fd1-ad5b-e61ebf6d8449/english_dialogue_worksheets.pdf
    • https://s3.amazonaws.com/dowesitobuga/calculator_vault_apk_uptodown.pdf
    • https://s3.amazonaws.com/timeziso/assessors_report_example.pdf
    • https://uploads.strikinglycdn.com/files/bcfc726a-74ee-41cf-901b-5dc8a70193bf/purida.pdf
    • https://s3.amazonaws.com/mefonevimimix/cursive_writing_tracing_practice_sheets.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd9e.bin
1bc13c7caa6317b141128e0718a6c411e16a583ee7ca1fdc4ea71e45a7f773e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9E 4740 bytes
font_01_sfnt_off0000ddc0.bin
9d39b403ceda7fb46f3c8392ae4eaea9f9a7ff6919adc1eeb1214b2d03410c33
pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC0 11580 bytes