Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd07c14e3fe4358…

MALICIOUS

PDF

173.1 KB Created: 2020-08-16 01:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed86520c1eb7e076ce7630c5609e02ca SHA-1: 8ce40e96712f057c61ed0526a1c67f690097ca6b SHA-256: 3cd07c14e3fe4358ed41f6d7b252c259ecd3b0fc5a45075a1f1820ae21890402
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/pify?keyword=another+love+cover'. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, contains the same malicious URL, indicating the primary intent is to lure the user to this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/pify?keyword=another+love+cover
    • http://files.startmyseo.com/uploads/1/3/1/3/131380889/5f457.pdf
    • http://files.kcldentalsociety.com/uploads/1/3/1/8/131871721/b91e823f138c50.pdf
    • http://files.captainstinkyandsailorpuss.com/uploads/1/3/0/7/130776088/8649604.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/pimenimuwefediwawuxofodi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2086/9019/files/debuwapixomekojekusu.pdf
    • https://cdn.shopify.com/s/files/1/0440/7446/7478/files/73998373619.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9319/files/pabijapuroze.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9945/files/tolejoxizovizoguza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9655/6191/files/15128119066.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/roads_to_geometry_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/free_ebooks_learning_russian_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6615/4394/files/piximabega.pdf
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/kafuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/50374984179.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024a08.bin
b639a5062b02c714e72afad92ef38b142be8c0ff71cdf8c7dc995047f29674ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24A08 4288 bytes
font_01_sfnt_off00025883.bin
a35b796bbe98cce1dcb6da5095fa168f042b5c81df33123617e2ef305947dcde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25883 25076 bytes
font_02_sfnt_off000296db.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x296DB 4324 bytes

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