Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee19ca26c421d9ca…

MALICIOUS

PDF

44.9 KB Created: 2020-07-31 06:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70a7f4f66795116468184ed97faf966c SHA-1: f44ee95d3301dd4429dc179ae927f9c0bac7b6ac SHA-256: ee19ca26c421d9ca28601f73a9d8824b3f21cdbb8135452c6e0f0a29e9dbf54d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. Another critical heuristic indicates a PDF link farm, suggesting SEO poisoning tactics. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a date, but no clear textual lure. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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=candidiase+mucocutanea+cronica+pdf
    • http://files.helen-bouchardart.com/uploads/1/3/2/6/132682040/83eaac444.pdf
    • http://files.caitlindemeyere.ca/uploads/1/3/0/8/130813489/62614eaacdf.pdf
    • http://files.wadokaisouthwest.com/uploads/1/3/0/8/130874205/2922314.pdf
    • http://files.boxersvonamadeus.com/uploads/1/3/1/0/131070847/mawepuxukisis_riwujaporub_diditet.pdf
    • https://cdn.shopify.com/s/files/1/0439/7573/7502/files/rafuzozimikevirav.pdf
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/ramevamigesuwo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/64448478261.pdf
    • https://cdn.shopify.com/s/files/1/0435/8701/0715/files/86870233073.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/tubarogiluzariwelezijeru.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/zofusubej.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/44069862319.pdf
    • https://cdn.shopify.com/s/files/1/0432/6480/2982/files/safusutuxapumenab.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9725/files/fodorexido.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/
    • https://cdn.shopify.com/s/files/1/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007054.bin
81b18bfb49f787dff7062bd2e0b35b25b629a179bd909d0cb761e3c36c26ecf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7054 5172 bytes
font_01_sfnt_off000081d2.bin
5e21a17c261cf3dfd0e3fb2e05876e5a49cd7fb90caa5cc875d2b3160ff1233c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D2 10752 bytes

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