Malicious PDF — malware analysis report

Static analysis result for SHA-256 23cce6abc5790699…

MALICIOUS

PDF

42.1 KB Created: 2020-08-29 23:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7700d43bfe04b366453c62a839a6168a SHA-1: d543a77bd4d80821bab26ca68626b16282468981 SHA-256: 23cce6abc5790699ae5aa13618ea2eb3187b023316d0dbdbe817cdeb364744b4
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=apa+style+research+paper+guidelines'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on Shopify and static.usrfiles.com, suggesting a link farm or SEO poisoning attempt. The primary goal appears to be directing users to the malicious redirector under the guise of academic guidelines.

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.com/wix?keyword=apa+style+research+paper+guidelines
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/38865423678.pdf
    • https://cdn.shopify.com/s/files/1/0449/2158/5831/files/guia_ceneval_pedagogia.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/adobe_acrobat_2017_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/1379/0106/files/75804445757.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4aa6b52ad8c4f63ba4bd253b9a4b068.pdf
    • https://static.usrfiles.com/ugd/b8c837_c158ba2cfbc04189b35daf60ae48f1cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_682d915c828e49ccae42f5eabca10abc.pdf
    • https://static.usrfiles.com/ugd/b8c837_237d3ab74ea845c88c79e92779e2444f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d49632ee9294ca1a27a9e31d8779245.pdf
    • https://static.usrfiles.com/ugd/b8c837_96bc9a3e240048ac803e233e71ef1f68.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f994760ee454f9daf7516dd194d8805.pdf
    • https://static.usrfiles.com/ugd/5be868_9519f3dc5f054eb0824dd7b220cd7209.pdf
    • https://static.usrfiles.com/ugd/b8c837_15b281b7a1174926accdf296b76d35f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_72020fa966ed421cae4e09872c55cac4.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_off00006732.bin
df88d4bce77170907e96120fe87898dbcb215930e6b00831c7dfcc54d8ee2ee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6732 5428 bytes
font_01_sfnt_off000079a0.bin
15b02d45a3b3e59dec1013fc5c32863158e9725a9674a27c9e7663c85ce42a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A0 9948 bytes

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