Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15508e035286ba8…

MALICIOUS

PDF

49.8 KB Created: 2020-11-01 18:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1fa8cc5f9aa3c4cc259018b06f9a2ef4 SHA-1: 08a93951a654e86473a2c687306098aa6bfc4e55 SHA-256: d15508e035286ba850dd9ad023f63e71e5ccbd6882932cbb928f1d5bc949fdc6
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?keyword=matrix+basics+worksheet+answers'. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. No scripts were extracted, but the presence of a malicious URL indicates a phishing or malware delivery 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/123?keyword=matrix+basics+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421365/normal_5f966bb7b0b83.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/kasodopizafazakoxuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f882fe10f6f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_5f91d4009e9b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_5f895e321a4ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404121/normal_5f9bf588608c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384050/normal_5f9110cb0949f.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/6865923.pdfIn PDF document text
    • https://movidotibapokab.weebly.com/uploads/1/3/4/2/134265591/8070628.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_5f8eeabcedb64.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/905a0c5b-5a86-4710-b52b-02afa749238c/42496721199.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D89 5012 bytes
SHA-256: 0202281a4107cebf6c65251fbdd88847a9438635600d32fe6d5642d4626f727e
font_01_sfnt_off00006e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9B 12116 bytes
SHA-256: 1d5d7bb42e3a5839ccc8c6cca3cb2846d3c7dbde1cfa4a90ab9191a90359fc07
font_02_sfnt_off00009755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9755 16060 bytes
SHA-256: 84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727
font_03_sfnt_off0000abe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABE8 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.