Malicious PDF — malware analysis report

Static analysis result for SHA-256 9baa804573fe21fb…

MALICIOUS

PDF

44.0 KB Created: 2020-11-04 01:12:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 82f015f14b4739e2e36add05ab024122 SHA-1: 7b9b27cfe262222e9a52d716d67d8d5c64978870 SHA-256: 9baa804573fe21fb42427e6f03ea91b1cb5374d4646aac68a101fc774a237f0a
142 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link disguised as a download button, which redirects to the URL https://ttraff.club/123?keyword=trim+fit+keto. This URL is flagged as a malicious redirector. The document body contains obfuscated text and the same URL, suggesting a phishing or malware lure. No scripts were extracted, but the PDF structure and embedded link indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/123?keyword=trim+fit+keto In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/56960983394.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/xatuvurixorivug.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/satowimakukewefulotizi.pdfIn PDF document text
    • https://s3.amazonaws.com/potevip/project_freelancer_names.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/83087329966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88d57e16-747d-4e65-8968-ece8f77fadb8/29887449155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ccf7937-f1f5-4303-9dc9-1470c027f8c9/dabezam.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/19317262014.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/big_ideas_math_algebra_2_chapter_5_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/832e074f-f6b1-4ffa-a9af-fbb3d526ec2c/vosodefedida.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/23472645640.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_off0000701f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x701F 4508 bytes
SHA-256: 882eec4c478cc21992e0714e7711e51e7a1be6e0323312ea4f04cda3f10741e7
font_01_sfnt_off00007f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F63 10632 bytes
SHA-256: f2649d1599d2354027a8637f96ab86a7d29e5b5601c36683172a7690ebb1b0d3

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