Malicious PDF — malware analysis report

Static analysis result for SHA-256 59101852c74ae4f0…

MALICIOUS

PDF

50.6 KB Created: 2020-08-24 05:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b25a7c1cce9b199cec0b5ff5c2de8ea9 SHA-1: 84ceb52db0577aac25472d60b3de03f65678ab52 SHA-256: 59101852c74ae4f000aa9f58387c2900f7d85c07106baf0023feb27c290ae5b3
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a reference to 'brave new world book online pdf', suggesting a lure. The PDF also hosts a large number of external links, many pointing to Shopify domains, which is characteristic of SEO link farm abuse. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=brave+new+world+book+online+pdf
    • http://nakulare.brandito.net/uploads/1/3/0/7/130776008/c0512094658.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/xowomano.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/wipokajujomaruwaxulugiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56346524494.pdf
    • https://cdn.shopify.com/s/files/1/0428/6844/1254/files/85507086105.pdf
    • https://cdn.shopify.com/s/files/1/0440/1912/2341/files/wufuzikajuvojewibokoxiv.pdf
    • https://cdn.shopify.com/s/files/1/0440/7571/2664/files/riwijobujizororilagaxa.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/67159036077.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/71979489739.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/eos_70d_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevegijetowid.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/nuvuvetibi.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_off0000898c.bin
b49c70bc9783fe68f6e1a26dad0352336ea35dd33c692394123ba1b30a3387bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x898C 5264 bytes
font_01_sfnt_off00009b96.bin
57c8025b5f5cc80939fd37cd6994bb30717290e3b91ef03b52283813cfec9f5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B96 10120 bytes

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