Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeebaadead526e84…

MALICIOUS

PDF

36.7 KB Created: 2020-08-08 08:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80ef4209fc8b921e24c57572d207ce18 SHA-1: 6f2e95b10da080a0973cbfee9a0594064b0ff40f SHA-256: eeebaadead526e846124365ade1c8af7a6681a193ed60785cd1ddf574f239581
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic firing indicates a link to a known malicious redirector, `https://ttraff.cc/pify?keyword=a+level+biology+questions+and+answers+pdf`, which is likely used to obscure the final malicious destination. The document body text, though heavily corrupted, contains fragments suggesting it is a lure for 'a level biology questions and answers pdf'. The primary attack pattern involves tricking the user into clicking the malicious link under the guise of educational content.

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.cc/pify?keyword=a+level+biology+questions+and+answers+pdf
    • http://files.boxedph.shop/uploads/1/3/2/7/132712088/goxipavopemilifixo.pdf
    • http://files.4hcampohio.org/uploads/1/3/1/0/131070151/libajivipudere.pdf
    • http://files.ntyf.org/uploads/1/3/0/7/130775286/zuxan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99839510681.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2901/files/8732387073.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/90606712772.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16946396068.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/bonitel.pdf
    • https://cdn.shopify.com/s/files/1/0430/5072/9634/files/norewet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/81853523773.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4551/files/19685961987.pdf
    • https://cdn.shopify.com/s/files/1/0430/7641/9744/files/lagoditorapobivilizoze.pdf
    • https://cdn.shopify.com/s/files/1/0436/3508/1374/files/dapozevapugozadoxawujepun.pdf
    • https://cdn.shopify.com/s/files/1/0437/7231/3751/files/vaporugigeruzikiwidoxuki.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_off00004f37.bin
0e3f7b5599315ae9e38a81df27b009c7772e80eb43e2a36dbebc7763e8049a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F37 5716 bytes
font_01_sfnt_off000062d2.bin
1b87cdfbfb0cb8dddf7199982957bd80764a4410de1425157ee21c00b3c3cb12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D2 10304 bytes

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