Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1cbbf5ac007f65a…

MALICIOUS

PDF

33.4 KB Created: 2020-10-22 01:34:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 04152a364368c4e6cb466a857c3e984d SHA-1: 76a0d95113aab191478850f0a1a247c5f8eeea06 SHA-256: e1cbbf5ac007f65a8e2e711ebf97fc96700b3ce682ad1d675e2dd259fb097db9
94 Risk Score

Malware Insights

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

The PDF contains a link disguised as a parts manual, which is flagged as a malicious redirector. The ML classifier also strongly indicates maliciousness. While no scripts were directly extracted, the PDF structure and the presence of a malicious link suggest an attempt to redirect the user to a harmful site, likely for further exploitation or phishing.

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://ttraff.link/pify?keyword=ingersoll+rand+15t+parts+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f89d38b88c1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f8d6e336f0b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5f8f2f23044ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380883/normal_5f90a5bc2c786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_5f8e2ebf67505.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5f90ab08b7ce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366381/normal_5f874aed41225.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_5f8fadfa91437.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/zetare/pojub.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/autobiography_of_a_yogi_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/50468202138.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/atp_finals_2018_draw.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/80500795595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e0b6e55-3de8-4944-8b3a-f5c629a60052/57054758763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a45db0a4-b4ef-4178-b953-15acafa91310/31335472939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b7e0ec-2ece-4399-b7c5-118a2896d84c/rigadaxib.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_off000047df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47DF 5392 bytes
SHA-256: 541f88ae15888019973ea09057ef54ff3e65788011f1c6f8429152733bbb2877
font_01_sfnt_off00005a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1D 9016 bytes
SHA-256: 99674b3c4b7a38e9fdae750cc2bbd2aa8c7f9a3e1614c6fbfb491859fae90d01

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