Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8caabd8e45e231…

MALICIOUS

PDF

92.2 KB Created: 2021-01-08 11:32:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 565644a0c606e18a691f68f39fdb3f37 SHA-1: 42867e121ef34dd0d4221630d9429fd90b6f4c69 SHA-256: 1d8caabd8e45e231f3a25b2bd8d23a51021bfbfb57d53dd9f267a2d34a239552
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 'https://gettraff.ru/123?utm_term=contemporary+marketing+16th+edition+pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/123?utm_term=contemporary+marketing+16th+edition+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_5fc0c98fef3a7.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/gc3Khio/setad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5f8fc21e48099.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428341/normal_5fa0083654257.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/iaT2xib/pixel_worlds_mod_apk_1._5._31.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/d45d370c-fc75-4ace-a61a-d923b202ddaf/2002_ap_calculus_bc_free_response.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/5389149910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c01192-03cb-4d26-b49d-79cbd7dce742/4346413843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99dd4279-73f5-49b2-93f4-ba23b4ea6747/vamer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/804e507c-99ac-4e6c-b58b-e5e5ac7ca6be/watch_doctor_house_season_1_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/59109151416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc8b1d3-508e-4011-a125-e37bc222483a/nfl_schedule_week_12_espn.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_off00011ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDF 5428 bytes
SHA-256: 57a92d92582623e1b9e0bd7f0abb47aa4ee9580ae662ced581da28b581872684
font_01_sfnt_off00013037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13037 10896 bytes
SHA-256: 089f5c333d8243fa3876f495ca3ccdb5b71ea8b4037197f2a86b4639a1785d23
font_02_sfnt_off0001555a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1555A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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