Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec782c3eb1d4beb…

MALICIOUS

PDF

59.4 KB Created: 2020-10-27 02:10:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 362a5a12028ccd70fd0d0065e8f27ae8 SHA-1: 1904cba2c69966050a7c03160bff5270d1313bd2 SHA-256: 5ec782c3eb1d4bebe20c9aca0790cd97fdfd8a54cd87e93e66b8967fa2954def
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links. The presence of a visual download button lure further supports a malicious intent to redirect users to potentially harmful content.

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.
  • 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.com/123?keyword=one+crazy+summer+full+text+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f90fdea2cada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403557/normal_5f9749b0a862f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_5f8ea8bae0943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388839/normal_5f967165ad8ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369768/normal_5f8d0d309bde8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_5f8b6d3717fbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f8761e6d5ffc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374520/normal_5f910ae0e3069.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/jamokaroxoj/tutimafafowosezunuwuvel.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/kiran_publication_maths_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/gakemunimeluduzotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/982249b4-d68f-4e27-99b6-87dd177aad6a/zetalobupip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41018c7e-ff29-404d-91dd-808f28a6ce99/zutokirudu.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/goronujutorijumugase.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/24280951963.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/xidasaxefofijim.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/jubemopusigesetolexabegod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9970/8315/files/36686025101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0957/1989/files/tea_tv_apk_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6855/1068/files/wafazuji.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9248 5548 bytes
SHA-256: 50041e22b892929547139c1b6172794ece8978df9384de76fc86847181b0d05e
font_01_sfnt_off0000a522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA522 11208 bytes
SHA-256: f5582260734bf5649452deb784d1b3fe30b74a68efd41d79ee3bd3adf32fcf3a
font_02_sfnt_off0000ca65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA65 16248 bytes
SHA-256: 2ffe0065ad8a4efff0e8f9db3fffdc285a08b07fe6b7db3d69aed5e68b96de1f

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