Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ee69c225733766…

MALICIOUS

PDF

41.3 KB Created: 2020-08-11 20:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 508f1391790f1e144e4c5c6b8671f8a1 SHA-1: 41216dc4016f97a425e7c9b592d86d7d27350c70 SHA-256: 51ee69c225733766d6181d75f9fc4cab022b85e665fba7922138c4b67138adba
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, characteristic of a link farm. One of these links, 'https://ttraff.cc/wb?keyword=chemistry%20experiments%20high%20school%20pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous Shopify-hosted PDF links indicates an attempt to obscure the malicious destination by hosting them on seemingly benign platforms.

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/wb?keyword=chemistry%20experiments%20high%20school%20pdf
    • http://files.healthandculture.net/uploads/1/3/1/4/131407106/gisenu-jelalatagutul-busonifok-vupiwoju.pdf
    • http://panisivik.accesswellbeing.org/uploads/1/3/2/6/132680813/06a8b0ec2cff276.pdf
    • http://files.thehiveweddings.com/uploads/1/3/1/4/131482988/092e08f47098.pdf
    • http://files.delmarinelloart.com/uploads/1/3/1/4/131406369/revejape-tevozozaru-dezopufa-javijebetitigik.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4741/files/bezalemiku.pdf
    • https://cdn.shopify.com/s/files/1/0435/6482/6773/files/98988938020.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/24278157455.pdf
    • https://cdn.shopify.com/s/files/1/0433/7644/3557/files/temusalinepefegajilevafu.pdf
    • https://cdn.shopify.com/s/files/1/0439/0230/4408/files/tejuvalonupegegofepu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/gikuze.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/wavupesepubonanavonake.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/30492703849.pdf
    • https://cdn.shopify.com/s/files/1/0435/6843/1265/files/trazado_de_caldereria_boca_de_pescado.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/renasaxijukaza.pdf
    • https://cdn.shopify.com/s/files/1/0432/6778/4864/files/78648615391.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/43697467840.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1074/files/7641927705.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_off000062ba.bin
feaf583e6f42908179762e2939a6f60c5ecf9fd83dd5999ef48ed54979f4cc9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x62BA 5432 bytes
font_01_sfnt_off0000751d.bin
900af71d3430536ab054d5dfd057f7a862de16d61ee3380008e25469e5ca1855
pdf-font-stream PDF embedded font (sfnt) at offset 0x751D 10260 bytes