Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ccff2cad07c097…

MALICIOUS

PDF

46.9 KB Created: 2020-09-01 17:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7d14820a598988be08a9ce0f2e6f624 SHA-1: dcc4f9de9cc760d04891d0cd373152fbc3b8af8d SHA-256: c6ccff2cad07c097513bb25384fe9a56c86d29b6432beae93540600ea51003a1
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which is likely used to funnel traffic to further malicious content. While no scripts were extracted, the structure and heuristics point to a malicious PDF designed for traffic redirection or SEO abuse.

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.com/wix?keyword=squarespace+wiki+template
    • https://static.usrfiles.com/ugd/253000_0e776dd2e29642978370067b5b1302fe.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_c83f92870348497f908e352a083580af.pdf
    • https://static.usrfiles.com/ugd/a64c8c_35108245eeb8446fb484933d8fd5de0e.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_c358945ac1444a2f9974ed8e374f3814.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa69dcda05904dac861d848e4ad6c543.pdf
    • https://static.usrfiles.com/ugd/cc10e7_5d2ceeb92e014dee8d6684e35bbc5cae.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6c34eea607d423bbeb400693806f6c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_eed5214769894018ade179f2bcb6e221.pdf
    • https://cdn.shopify.com/s/files/1/0436/6172/1765/files/hotspot_shield_premium_apk_6.9.7.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4717/files/35099132198.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/fipofenavixaguli.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/53426219489.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/50200144051.pdf
    • https://cdn.shopify.com/s/files/1/0431/0954/8188/files/28406263126.pdf
    • https://cdn.shopify.com/s/files/1/0427/9857/9879/files/soxoxokifevibufag.pdf
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/bachelor_pad_plans.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_off00007973.bin
5e27cc7db9eb87182fb70a200379abedf82aef4f26cde7b11aa88bd305098077		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7973 5464 bytes
font_01_sfnt_off00008c12.bin
d73849edae4c26f7bcd2383f3c04e651daad8964d9dec1c635290665ffb4523e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C12 10080 bytes

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