Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b8b2307f215715b…

MALICIOUS

PDF

35.5 KB Created: 2020-08-22 04:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05a2d58e8f783ce5982e4f6ae39b2678 SHA-1: f1d3ffafdb74d70e5d2841c9df247e426d7aa1c9 SHA-256: 2b8b2307f215715b56af551bd5f16603d2f47e3d21f4567215fe1e661b1a7972
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links pointing to other PDF files hosted on Shopify and other domains, indicative of a link farm. One of the primary links redirects to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of a link farm suggests an attempt to manipulate search engine rankings or distribute malicious payloads indirectly.

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=bandook+song++djyoungster
    • http://files.accentedglory.com/uploads/1/3/1/6/131636655/nujojubo-tesekirimu-zubimemexedas.pdf
    • http://files.mycollectivedesigns.com/uploads/1/3/1/8/131871466/rovasavoda.pdf
    • http://files.deltonamiddleffa.com/uploads/1/3/1/0/131070612/842167.pdf
    • http://muwaf.pdkmusic.com/uploads/1/3/0/7/130775403/8bcf7af43cd4e8.pdf
    • https://cdn.shopify.com/s/files/1/0434/2182/7222/files/python_script_for_ssh_connection.pdf
    • https://cdn.shopify.com/s/files/1/0436/4363/3822/files/ancient_egypt_language.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/38154760124.pdf
    • https://cdn.shopify.com/s/files/1/0436/9471/9131/files/56785351744.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/80656550675.pdf
    • https://cdn.shopify.com/s/files/1/0428/3128/2335/files/pdf_to_word_converter_offline_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/53655820956.pdf
    • https://cdn.shopify.com/s/files/1/0429/9803/8679/files/80048038815.pdf
    • https://cdn.shopify.com/s/files/1/0438/1471/5549/files/80621279381.pdf
    • https://cdn.shopify.com/s/files/1/0452/8229/5969/files/entrepreneurship_development_noun.pdf
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/kekalaxat.pdf
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/98016454997.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_off00004af0.bin
d3bfd0922463959910fab57d5a839229a6540bf8070257130fd26c4f1eb0cfb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF0 5252 bytes
font_01_sfnt_off00005ce8.bin
230d6e70064d8a45b8e5f94d3d207ae89a2f162611e15835e024073b021211be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE8 10588 bytes

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