Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c7d0c1b60516e6…

MALICIOUS

PDF

39.7 KB Created: 2020-11-02 07:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 906230760f3f2d693857921e95a1e3e0 SHA-1: 5c1d13c1c9bb136214cbf2501d28c5591e7ec657 SHA-256: 45c7d0c1b60516e60245bb5ea7d80191ee68667175d20daf7ef12818ee0648bc
102 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is likely intended to deliver a malicious application. The document body also contains text and URLs that appear to be lures for downloading software. The ML classifier strongly indicated maliciousness, supporting the presence of a malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.link/123?keyword=free+cartoon+hd+3.0.3+apk+download
    • https://cdn-cms.f-static.net/uploads/4408586/normal_5f991aaebfe4c.pdf
    • https://xopigitit.weebly.com/uploads/1/3/4/3/134339451/9472592.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/vevimi-zamijepuxikuzab.pdf
    • https://zugufavowi.weebly.com/uploads/1/3/0/8/130874222/8998485.pdf
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/2022661.pdf
    • https://cdn-cms.f-static.net/uploads/4406454/normal_5f9a1d825632c.pdf
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5f8ff475e9fdd.pdf
    • https://cdn-cms.f-static.net/uploads/4402244/normal_5f9f6f33b1334.pdf
    • https://tujebikofo.weebly.com/uploads/1/3/4/3/134359874/todanixukoj.pdf
    • https://rewudorabemomaf.weebly.com/uploads/1/3/4/2/134234845/b0f88624cda10.pdf
    • https://juvikenozenukun.weebly.com/uploads/1/3/4/3/134322787/2097879.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/85403d60-f140-4108-86a6-35db29a4f218/xasavatamoburezopud.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a87.bin
05fb20ddbcee21361115da8b8f5a8685520d00618aa3167784ed10eae8591e45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A87 5432 bytes
font_01_sfnt_off00006d16.bin
419b2da5fdb05899e402d16e08237cb2ed4694df4433f0a8d19608815c7eef39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D16 10960 bytes

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