Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a1a60f1d58578ea…

MALICIOUS

PDF

65.8 KB Created: 2020-10-28 13:55:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a71159005612011aafc672fd60665879 SHA-1: 2d3875e372bde83e70f3f04fa6a7f6a61ab8ccd8 SHA-256: 3a1a60f1d58578ea6c0761fc67b5774ab860b97c9644aa9a078c7b595add89a0
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a heuristic firing for a malicious redirector link and a social engineering lure to install a browser extension. The embedded URL 'https://ttraff.me/123?keyword=the+cellar+script+pdf' is flagged as malicious. The document body also contains this URL, suggesting it's the primary lure. While no scripts were extracted, the overall pattern indicates a phishing attempt designed to lead the user to malicious infrastructure.

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.me/123?keyword=the+cellar+script+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f888de984836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f8aa9f20b0be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408702/normal_5f9853fecfbbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f8c12d82b6af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_5f990f2b1fa58.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/wexoteluwag/rizizugijemepogekefos.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/arbitration_and_mediation.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/free_download_tailoring_books_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/van_gogh_o_suicidado_da_sociedade_antonin_artaud.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/tagewigizafufarofelawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7796/6268/files/8500554901.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/clinical_pharmacy_and_therapeutics_herfindal_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/29458424709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/3920/7836/files/writing_tablet_app_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/7208/5926/files/93086234154.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/wusekulot.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFEB 5192 bytes
SHA-256: 1504cf26e374c3a6773dc2601a13d9563933da86f428e7c720920014eaddb4e5
font_01_sfnt_off0000d18f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18F 12048 bytes
SHA-256: 728fd6bfe4a0aac51156d2db76116b11e009e597992ccc4f65d5d874a3b0a3f8

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