Malicious PDF — malware analysis report

Static analysis result for SHA-256 87741a6853592b90…

MALICIOUS

PDF

38.9 KB Created: 2020-10-31 17:27:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 00eb51055ff9531132f953f43ea34ddc SHA-1: 75561c1dcfdc24135400498e71fe721a5e07dce8 SHA-256: 87741a6853592b90d2d35b695021495cfaba0d3d34fe30cf588ae5fb52ae42af
94 Risk Score

Malware Insights

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

The sample is a PDF document that contains a link to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The embedded URL `https://ttraff.com/123?keyword=wonder+woman+skirt+uk` is the primary indicator of malicious intent, likely serving as a lure for phishing or malware distribution. No scripts were extracted, but the presence of a malicious link is sufficient to classify it as a threat.

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.com/123?keyword=wonder+woman+skirt+uk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387243/normal_5f970a2d1b5f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381544/normal_5f8f32f043d4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5f8e80c36c217.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374979/normal_5f994bf4540ba.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/delelides_dasexurekiwar_jajumab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369928/normal_5f88b99e37937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379859/normal_5f8b9cea9e493.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d24e19-78ad-4379-a0e8-a9aa234a9b4e/wusonesawoxivalirudoxibep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7698f7b7-7ddb-46da-9345-00665ec5ff76/53139145261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4741/8518/files/free_download_music_youtube_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2732c9-e86c-45a4-a8a8-164a4f6693e2/samsung_un40eh5300_40-inch_1080p_60hz_led_hdtv_2012_model.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_off00005a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0E 5108 bytes
SHA-256: 67bf32124e59ecdbd78d3846018a5d1781621f44855a498cdb1368d47173e60f
font_01_sfnt_off00006b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6E 10724 bytes
SHA-256: ff435ff95643413cf71e79476cfdb72763bcb06a78a930708a3b7b3cb7ff940e

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