Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf30bc565e340ef…

MALICIOUS

PDF

41.4 KB Created: 2020-10-29 11:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 3d2aff9351f5d98ffed0f589d3214c86 SHA-1: cd8b64b7330d473a2e460d612220c7f160107e1a SHA-256: adf30bc565e340efb9ba0b03cfcc64d2d5f9eb02b7addb5be694bae808a0ad5b
94 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it is a malicious redirector, pointing to a URL that attempts to trick users into downloading a file. The embedded URL in the document body, 'https://cctraff.ru/wb?keyword=police%20constable%20answer%20key%202019%20pdf%20download', is the primary indicator of this malicious intent. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest a phishing or malware distribution attempt.

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/wb?keyword=police%20constable%20answer%20key%202019%20pdf%20download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_5f9a6258759e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416930/normal_5f968fc686d9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f951286210ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416154/normal_5f9699654d2af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5f91501093b97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0724/5976/files/autocad_manual_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5723/1525/files/mulibimivofodaburuninux.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/peninawogex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2389/0118/files/word_problems_keywords.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/free_minecraft_gift_card_code_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/bayliner_ciera_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/56889689766.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/27476589613.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/68424363100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8896/0924/files/experiments_in_modern_physics_melissinos_download.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/biology_sample_paper_class_12_2018.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_off000062f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F7 6032 bytes
SHA-256: 46060a04729102be3e6491b342b19b94e69d37bbe582b05d60eb1d55a1bb8d49
font_01_sfnt_off000077a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A5 9652 bytes
SHA-256: 07b12206631b06fd770c470cdf7f8b1a7e2106e0538f92bc4abcf8892e6b551b

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