Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9f7161a27a75f0…

MALICIOUS

PDF

42.3 KB Created: 2020-08-17 01:42:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b218d61813dc65a9419740e2c9f35802 SHA-1: d87c820039fead649cf4332d4a248e0fa054719f SHA-256: 6e9f7161a27a75f0877532cb32bb69580081adf30a09a4ef50f2d9d59a0ef8aa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/pify?keyword=pc+building+simulator+ios'. The document body also contains this URL and other links to Shopify-hosted PDFs, suggesting a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=pc+building+simulator+ios
    • http://files.macdesignthinking.com/uploads/1/3/1/4/131407855/vitogera.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/dofevut.pdf
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/punegowikeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/manual_accounting_system_vs_computerized_accounting_system.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1122/files/71915897173.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/faleno.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/agresti_franklin_statistics.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2089/files/rubebe.pdf
    • https://cdn.shopify.com/s/files/1/0434/1180/0220/files/superdry_size_chart.pdf
    • https://cdn.shopify.com/s/files/1/0452/9225/7441/files/o_que__apropriao_cultural.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fec.bin
cef6a69372e516038e2391d27669d395e6d2175eec88b18d542349c8f9a3995e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEC 5400 bytes
font_01_sfnt_off0000721d.bin
3c12a50fec31e456b8f9b5a7acc45b37f0ace963ca91554a6ce1392ac5e64334		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721D 13576 bytes

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