Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a469fbb1cb7a5b5…

MALICIOUS

PDF

56.6 KB Created: 2020-10-30 16:09:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 237e7135c9c23f4d0c0257499e67f177 SHA-1: e2d9b4f5436ab2e50c14b5924eddbe0d59f5d4db SHA-256: 1a469fbb1cb7a5b53034633d8a62997861b0ca8ca56b53f7e5bdbb29e4be6147
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.me/123?keyword=fortnite+letter+m+location+season+7'. The ML classifier also strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the document body contains obfuscated content and the embedded URL suggests an attempt to lure the user to a malicious site, likely as part of a phishing or malware delivery scheme.

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.me/123?keyword=fortnite+letter+m+location+season+7 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413707/normal_5f9baeafb2061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408197/normal_5f98167fbbcc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409630/normal_5f952ec451a23.pdfIn PDF document text
    • https://fumubesoxumus.weebly.com/uploads/1/3/4/4/134485348/5287e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404966/normal_5f9ab822418a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lulelepese/inductive_voltage_transformer.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/lufabomitis.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/zakaxerilegamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/1124/9580/files/que_es_temperatura_corporal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6534/6725/files/anet_a8_3d_printer_assembly_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2019/2408/files/vidmate_download_for_android_2.3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/5950/3000/files/hawaii_state_id_office_number.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/74883587137.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9426 4768 bytes
SHA-256: b1b963d909c8e516dff8a0c8fe119acc90c06ef5e582934f848e123b080608eb
font_01_sfnt_off0000a430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA430 10152 bytes
SHA-256: 84ce32cf100caccb311df84fb7b6081754e10e282a5e347ef84affa596dad7cd
font_02_sfnt_off0000c6cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CF 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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