Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6445f25d2cbab14…

MALICIOUS

PDF

41.8 KB Created: 2020-08-11 19:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 835dda22cac7a795381113ecb0840659 SHA-1: b4b55b40f5541d61bfe27c3b99308a72b1e1e465 SHA-256: a6445f25d2cbab14470e4c0074d74c5a3e4c41b292c94ccaa5f3d2d4795a39f2
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent link redirecting to a known malicious URL. The document body, though garbled, contains the text 'Smoothie recipes for optimum health pdf' and the malicious URL 'https://ttraff.cc/pify?keyword=smoothie+recipes+for+optimum+health+pdf', suggesting a lure to disguise the malicious redirection. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the presence of a link to malicious infrastructure.

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=smoothie+recipes+for+optimum+health+pdf
    • http://files.taso-ssa.com/uploads/1/3/1/4/131453984/xiruzukeva.pdf
    • http://files.mesamindfulness.com/uploads/1/3/1/3/131384335/c54a97c33ffd1.pdf
    • http://kepatufet.melanievanzyl.com/uploads/1/3/1/0/131070450/28e2a9.pdf
    • http://jajiga.mdcsmith.com/uploads/1/3/1/0/131070581/6552865.pdf
    • https://cdn.shopify.com/s/files/1/0428/9101/8396/files/55061468369.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/padobizin.pdf
    • https://cdn.shopify.com/s/files/1/0437/5671/6183/files/bejumulonulawunawewu.pdf
    • https://cdn.shopify.com/s/files/1/0445/5910/6212/files/anatomia_de_la_piel_y_sus_anexos.pdf
    • https://cdn.shopify.com/s/files/1/0428/6893/2767/files/68459748100.pdf
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/bromatologia_de_alimentos.pdf
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/vuvogefizobudukomulus.pdf
    • https://cdn.shopify.com/s/files/1/0434/1959/9004/files/xosodezuporesovore.pdf
    • https://cdn.shopify.com/s/files/1/0429/6949/7753/files/53156229826.pdf
    • https://cdn.shopify.com/s/files/1/0435/0902/2886/files/47442306840.pdf
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/zijumidixizapab.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_off0000654f.bin
376aa4d5820c9f2d9a1948e2129bdf03f6307bdb1b1954d0e019a5d94e0eaf29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654F 5500 bytes
font_01_sfnt_off000077da.bin
79af20857ada88a7945126a90889999dd46631c726ac7fc23da4b18f42ab10e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DA 10076 bytes

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