Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0fce988b0694b1…

MALICIOUS

PDF

34.2 KB Created: 2020-08-17 00:54:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 463e5f74228606b872f9f1e00632732d SHA-1: 2296af1b6bbffa6dacd154a5dd5d0b53ec1bac9c SHA-256: 4e0fce988b0694b1c00add4e03a2b053204b9c1f3c05a30985653af78dd8f633
120 Risk Score

Malware Insights

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

The PDF contains a link farm and a direct link to a known malicious redirector, disguised with text suggesting a report card. The primary malicious URL is ttraff.ru, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the URL and text related to a 'yorkville school district report card', indicating a social engineering lure. The presence of numerous external PDF links suggests an attempt to distribute further malicious content or engage in SEO poisoning.

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.ru/pify?keyword=yorkville+school+district+report+card
    • http://files.adamflemmingdesign.com/uploads/1/3/2/7/132712251/9971455.pdf
    • http://ruwonax.rockvillehelp.org/uploads/1/3/1/3/131380345/weduxetubugenu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6550/6966/files/45539230917.pdf
    • https://cdn.shopify.com/s/files/1/0440/0313/1542/files/fenujuxitapomajab.pdf
    • https://cdn.shopify.com/s/files/1/0437/9380/9557/files/33384548431.pdf
    • https://cdn.shopify.com/s/files/1/0439/2534/0328/files/82448993952.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8076/files/14012469984.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/32043748581.pdf
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/pogofoxevosizanuwazir.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/etiologi_asma_pada_anak.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/bumofowituwela.pdf
    • https://cdn.shopify.com/s/files/1/0440/2901/8262/files/53825608477.pdf
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/95062837049.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xefafozerokadugatevaru.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/zesibekegapagixesumuvida.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004806.bin
e9c242067bc7f600f21810be9c75a1aa2902f660f3678303ba9595475f77e4a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4806 5248 bytes
font_01_sfnt_off000059d7.bin
633affd014e69500354e02ffbe2133ff3b7db4b30dd9673bef5db409ee4324de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59D7 9936 bytes

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