Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b099bc1c514faff…

MALICIOUS

PDF

70.2 KB Created: 2020-12-21 09:43:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 788f64d8e9058cde38c54f1dd073f107 SHA-1: 9cae5d384a9d1c6cc0c9d79f185384d994ca1a85 SHA-256: 9b099bc1c514faffc9435594b594821e492caf6f9818ac69c326b046acd386a0
214 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`. Additionally, a machine learning classifier and ClamAV detection strongly indicate maliciousness. The embedded link is designed to lure users to potentially harmful content, aligning with phishing or scamming tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=ap+environmental+science+comprehensive+study+guide In PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/pakusexikoni.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/babetafaperaxov/que_es_aprendizaje_autonomo.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/apk_for_whatsapp_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/ccap_background_checks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31a5a497-480e-458b-a56f-efe65f1b18b5/85744056862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80e96c59-a4db-44f3-a063-9cfae456996c/druzy_quartz_missouri.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc34c7eea4a794d56549c18/t/5fc6f8fa09f4d56e8f78f0de/1606875386997/mewodutuguzamir.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/sebuzajumojowavukakilim.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/gunosegofubutomiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f2208aa-a37c-4994-86cb-789eceea6306/kopazevujul.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/android_authority_app_development.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/69295683059.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc560a817e720264007f80c/t/5fd66c1d267c8d0ace488532/1607887903359/beautiful_now_song_ringtone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86a61d0c-12a0-4546-ac54-cb128d3b3339/cwc_co_watch_case_serial_numbers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd52f507af9e0e16f5551b/t/5fdd778afb7de13a6444509b/1608349579512/blueprints_clinical_cases_in_psychiatry.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_off0000d51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51B 5640 bytes
SHA-256: c4b3ec1425930a1cca5e59bfdcf49ff43b09ea92c61e8c85ffe4c12758c40727
font_01_sfnt_off0000e822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE822 10248 bytes
SHA-256: ee0f08826714633a2857b4705d49fae252db36891df3d3d25e4c2fed6853d4cc

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