Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba294bcde11a7cf6…

MALICIOUS

PDF

35.3 KB Created: 2020-08-12 23:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41fde7cb1e3b4d9cc57462c940eb1a7e SHA-1: d58b85c3b05616fd99bb981eb94ad9df690f4a47 SHA-256: ba294bcde11a7cf6f2eecd52390d8fb6ed9f51d57d60d3e27275f8ab783c9cfd
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary one being 'https://cdn.shopify.com/s/files/1/0433/0097/8853/files/84215774092.pdf'. The document body, though heavily obfuscated, contains text referencing 'Casti guidebook to asme b31. 3 pdf' and the 'wkhtmltopdf' tool, suggesting a lure to a fake document. The presence of multiple external PDF links indicates an attempt to distribute content or redirect users to potentially malicious sites.

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=casti+guidebook+to+asme+b31.+3+pdf
    • http://files.visionsofexcess.co.uk/uploads/1/3/2/6/132681443/61087e3.pdf
    • http://files.beautifulyounailsandspa.com/uploads/1/3/0/8/130874587/d0250ae14.pdf
    • http://mulimol.allielullart.com/uploads/1/3/2/6/132696194/9495353.pdf
    • http://rulinaneg.lakelehmanmetz.com/uploads/1/3/1/3/131398186/xiluxirep-widaf-mupuw-xadovodixifa.pdf
    • http://files.synaesthesiajournal.com/uploads/1/3/2/6/132696030/xufikavasaxi_logig_kovunulob_mosisosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/84215774092.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fodafozisejuleluz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/votixodogofovigatinoninu.pdf
    • https://cdn.shopify.com/s/files/1/0436/7892/4953/files/planos_de_casas_campestres_de_dos_pisos.pdf
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/84065010854.pdf
    • https://cdn.shopify.com/s/files/1/0435/3009/2712/files/diletijuvusazetama.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/raboliber.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/molecular_mechanism_of_cell_differentiation.pdf
    • https://cdn.shopify.com/s/files/1/0431/8615/9767/files/vomevejulorajiwer.pdf
    • https://cdn.shopify.com/s/files/1/0432/7348/6496/files/8164344508.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4277/files/functional_neurological_symptom_disorder.pdf
    • https://cdn.shopify.com/s/files/1/0439/1154/4987/files/99991321670.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_off00004abe.bin
b82bcf1addfe4f40bfebac2dc05a2bc01cb21780e8e4d88f16690e2edaaf89d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x4ABE 5588 bytes
font_01_sfnt_off00005dbf.bin
57700d89f68c97b7e59e831c420801881064fdb0e5940b68ee2f32e958072750
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DBF 10112 bytes