Malicious PDF — malware analysis report

Static analysis result for SHA-256 558463935bb132f1…

MALICIOUS

PDF

59.4 KB Created: 2020-09-09 00:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8da68e9019f3ef9487aa44e1f74bdf09 SHA-1: d8fa4e1dfd3ce02c8ad7fd016a058eaed237a1b0 SHA-256: 558463935bb132f1469524f7333cdb874b4a311312618088a17831a94147359a
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing for a PDF link farm. One of these links, 'https://ttraff.club/wix?keyword=define+uniform+circular+motion+accelerated', is flagged as a malicious redirector. The document body itself is heavily obfuscated but contains references to this URL and other Shopify-hosted PDFs, suggesting a coordinated effort to distribute content through a link farm. The primary purpose appears to be SEO manipulation or hosting malicious content via the redirector.

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.
  • 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.
  • 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.club/wix?keyword=define+uniform+circular+motion+accelerated
    • https://cdn.shopify.com/s/files/1/0433/7257/6922/files/59145276716.pdf
    • https://cdn.shopify.com/s/files/1/0428/8721/7311/files/rekixuzu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/congruent_shapes_worksheets_ks2.pdf
    • https://static.usrfiles.com/ugd/b8c837_65dd4643af9f455c84a9920ba3ddc9b8.pdf
    • https://cdn.shopify.com/s/files/1/0460/1407/0945/files/tipos_de_emociones_que_existen.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/free_video_er_for_iphone_app.pdf
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/blockchain_development_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0462/1300/5466/files/zubusuwotiki.pdf
    • https://cdn.shopify.com/s/files/1/0433/3528/6943/files/peniguvurixuguzegine.pdf
    • https://cdn.shopify.com/s/files/1/0434/4987/6641/files/heart_failure_guideline_2017.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_off00008bbe.bin
637050f61ffff4ab5dc18ffb5e3a100d42fc4004a877e0109d6699082ed6880f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBE 4988 bytes
font_01_sfnt_off00009ca7.bin
9b2adc99313299e40f95ec39b6698f5ea3c195ca15d8947a9abbda0ed47a76f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA7 14936 bytes
font_02_sfnt_off0000cbf4.bin
2d958bd008b8db5b33092f112e99c856adbcc0a100e950d14ff814b784be6357		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF4 16060 bytes

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