Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dcc77b529449833…

MALICIOUS

PDF

66.5 KB Created: 2020-12-21 12:27:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 790dcbe5f81c8e9fd473e8d0bbc6c3ed SHA-1: 291cae6e646f37a2695c8a0f0b69814987eabae7 SHA-256: 5dcc77b52944983374499247fd1b42b989caa94d11c5f759da4dc7883eda8bef
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. The ML classifier also flagged this PDF with a high probability of being malicious. Although the document body is heavily obfuscated, the presence of a malicious URL strongly suggests a phishing or redirection attempt to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?utm_term=acrylic+nails+short+coffin+shape In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_5f8e9e8de4a6d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1129368612547ed5f20ea/t/5fc54dde4e98326c02c0a91a/1606766046113/course_3_benchmark_test_second_quarter_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90662ed-e897-4c5a-bc1d-7bd6d46f6b30/mission_federal_credit_union_national_city.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/11282481527.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06b0d2e537a05ef0695ba/t/5fc153c35147b1480464d98e/1606505411733/how_many_ml_in_a_shot_glass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da2f5542-60e6-4c73-bf5f-a70e32bc3fdb/zutomiwurulepov.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc556c62bbd740658240790/t/5fc7296e56cd4459b3b2ee77/1606887791934/paypal_credit_card_machine_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f57306-1fc1-4a33-87e8-13523e69d524/56936001684.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/tedikoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1e63ce9-fe04-4321-9fc1-ab0ac4e7235d/tibuxofuzogowopu.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_off0000c725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC725 5192 bytes
SHA-256: 592d9b54393354f103a68d37c5bc9503d14765c14485791f3614bed511b4c5c4
font_01_sfnt_off0000d8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D9 10816 bytes
SHA-256: 6ce570baa94ef0191da016586bbf97c050726175b57ec1ea1e10457af2334893

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