Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4cff77268e22f9…

MALICIOUS

PDF

75.8 KB Created: 2020-12-22 22:34:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: dc02799b6b875974808770890c410d30 SHA-1: c33dfca1e3549ff18b069968fccea5d542f87763 SHA-256: ce4cff77268e22f971ed3ce56e40ffcf857081cc4f4563022a74e07328d3ca42
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 'ggtraff.ru'. ML classification and ClamAV also flagged the file as malicious. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs strongly suggest it's designed to lure users to malicious websites, likely for phishing or malware delivery.

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://ggtraff.ru/123?utm_term=what+is+volume+in+science+terms In PDF document text
    • https://najunores.weebly.com/uploads/1/3/4/3/134381484/8be664403cd8338.pdfIn PDF document text
    • https://rawebitor.weebly.com/uploads/1/3/4/3/134337567/sukusolal_logutulubimotez_puniga.pdfIn PDF document text
    • https://degusatujetuz.weebly.com/uploads/1/3/0/8/130813325/musipoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389080/normal_5f8ffca8337e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_5f9a97f38e9ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/aa060837-40af-4256-a21c-c0ec1c5b49c6/blue_pelican_java_lesson_18_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d7c15e8e827d42afc458/t/5fc6b43e0623334b0c45e58c/1606857791668/rome_total_war_campaign_map_lag_windows_10.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce32c08785af7abc630ca2/t/5fd1589b8185f4776afde3c4/1607555230226/icon_converter_2._0_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e3f7f6-2cb9-4c7b-b48e-ea9cc0f3f811/final_walk_through_checklist_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d8ef37d-1a4d-4c0f-b92d-d6577ad64307/gundam_g_self_perfect_pack_hg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d66d43-f13a-47bc-a5b3-2752bcd8f1e8/ennai_thottu_alli_konda_song_downloa.pdfIn PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/excel_calendar_2019_one_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/277034ce-29ac-404d-bfc1-5d0e05287d45/kesiduzisanomamixefixamu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7185a5fa98a681f0c9b59/t/5fd096490c0c9b10ab0b9204/1607505482489/lords_castles_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/functions_of_financial_management_information_system.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC1 4992 bytes
SHA-256: 568a3fcb8885339faef752865214020563709d6d4913ea2577fdce2effc32cbe
font_01_sfnt_off0000ef9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9F 10284 bytes
SHA-256: 9fc66d84981cb036b0bb5da60bef87c0d2a7a00920aaa37a01ef1b615dc716e2
font_02_sfnt_off0001127d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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