Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6d3763a3123c4c…

MALICIOUS

PDF

56.4 KB Created: 2020-08-19 20:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 536d765fccce4f2b86533c2b729e7e64 SHA-1: a2a929741fc63eca176c59d4298470785dbe0a16 SHA-256: 2e6d3763a3123c4c154b68569cad3772f2c23aced9fa5a504f07c51474df4ae7
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.cc. The document body, though heavily corrupted, contains text related to 'Amyloidosis guidelines pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise malicious redirection. The primary intent appears to be directing users to malicious content via the ttraff.cc redirector.

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=amyloidosis+guidelines+pdf
    • http://files.israel-civilian-k9-unit.org/uploads/1/3/2/6/132681201/e9ba7ed92e.pdf
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/sakegoxipukofeges.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/setajojekakal.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/77777487586.pdf
    • https://cdn.shopify.com/s/files/1/0432/6208/3232/files/candida_parapsilosis_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/pifixafamu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5040/files/tratados_internacionales_de_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/edit_adobe_acrobat_x_pro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9963/6390/files/36766476779.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_off000093af.bin
1e790dafed3b7fc1d492c945a448c3150fb39eacfbf44e7be7bbfd21338c605c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93AF 5148 bytes
font_01_sfnt_off0000a535.bin
1f804741bdbd97fe48c2bf3c4bd53b93f7b0a942dbc67052717aea934f9b6dde		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA535 15664 bytes

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