Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc16bb31338bbccb…

MALICIOUS

PDF

40.3 KB Created: 2020-08-11 12:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2020a39499962802f23bdb0aba884c5 SHA-1: 50baadfc029840d64a870425debfc4fdd864c19b SHA-256: bc16bb31338bbccbee87b6d853f02cf751b5af30a9ac31b69a80ec66b38f609a
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a high number of embedded links. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body contains garbled text but also includes the URL 'https://ttraff.com/pify?keyword=ecological+niche+pdf', suggesting a lure related to ecological niches. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a potential SEO manipulation or link farm tactic to distribute malicious content or traffic.

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/pify?keyword=ecological+niche+pdf
    • http://buzexedux.mphopkinsstudio.com/uploads/1/3/2/6/132682883/504db3dc759.pdf
    • http://lalag.tomsolaribuilder.com/uploads/1/3/1/3/131383483/xabomogozo.pdf
    • http://files.bar2nranch.com/uploads/1/3/0/7/130775242/vipebaluxiwo.pdf
    • http://files.naturalicatchirhythms.co.uk/uploads/1/3/1/8/131856414/koxogivar.pdf
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/b_j_thomas_advanced_vocabulary_and_idiom_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0428/3678/7356/files/28469100206.pdf
    • https://cdn.shopify.com/s/files/1/0431/7803/3303/files/dokibizujobudokikiriz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9285/files/resume_format_for_applying_job.pdf
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/atherosclerosis_slideshare.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/vidibaligofilenaxur.pdf
    • https://cdn.shopify.com/s/files/1/0436/6345/8457/files/wujutasusozamidowatela.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/venoxawawetat.pdf
    • https://cdn.shopify.com/s/files/1/0437/2919/1066/files/deforestation_and_global_warming.pdf
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/29817088495.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_off0000617c.bin
3e6617779f9cc4c55e6335f135318281cd31d33679d8ac4003cddce721484fea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 5100 bytes
font_01_sfnt_off000072d4.bin
92f3b336ec86fd3139e57f0fa024e8dd9ef355bedd5622b203c9a17cba07d799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D4 10124 bytes

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