Malicious PDF — malware analysis report

Static analysis result for SHA-256 edcc5d0aba59756f…

MALICIOUS

PDF

50.4 KB Created: 2020-11-03 10:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 513e4294dee23f04f6e72b3cfcbdd409 SHA-1: 1748ecccd343fafc47a88ca5a2d06a7963f22787 SHA-256: edcc5d0aba59756f99c5a3ed7b71536e9aca0321ca15b481e51f709c6b29132c
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating a malicious redirector link. The embedded URL `https://cctraff.ru/strik?keyword=603-389-1903+%253D+-1689` is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. No scripts were extracted, but the presence of a malicious link points to a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://cctraff.ru/strik?keyword=603-389-1903+%253D+-1689 In PDF document text
    • https://kunizemofowirux.weebly.com/uploads/1/3/4/3/134311671/c527075d5ac635.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/wonoti/salesforce_interview_questions_and_answers_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/alelopati_adalah.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/radone.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/13513831908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4839/8759/files/minecraft_combat_handbook_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/xulafawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9320/7461/files/unit_for_speed_in_mks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/bazepipisafixobizeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7233/8069/files/winrar_free_download_full_version_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/matifaxeg.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_off000089f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F1 5008 bytes
SHA-256: 9906c2ac9195ccf099970d7e414efba5ee53436310ca341244b09edd9881cda3
font_01_sfnt_off00009b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B1A 9924 bytes
SHA-256: ccadb74fa19440520ca46727b6a194d7d1ed8c8f7382747e5dd7cf60fc658a74