Malicious PDF — malware analysis report

Static analysis result for SHA-256 4449a56cfb4e86b9…

MALICIOUS

PDF

42.3 KB Created: 2020-08-12 16:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4938c43a07a817a4bb93b12bd90993f8 SHA-1: 2e5fc1375562400bfebab357cee63abad0d9f959 SHA-256: 4449a56cfb4e86b9ad17fcd57bdfde1913c41236d1a577b827a48ecea743e82d
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a technique often used to create link farms for SEO manipulation or to hide malicious URLs. One of the primary URLs, 'https://ttraff.ru/pify?keyword=nfl+preseason+2020+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a coordinated effort to lure users to malicious content. No scripts were extracted from this sample.

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.ru/pify?keyword=nfl+preseason+2020+pdf
    • http://files.mayoandsonconstruction.com/uploads/1/3/1/4/131455141/mituwu_wizufusevasej_zunasoneg.pdf
    • http://files.classicalmusictoday.net/uploads/1/3/1/4/131437878/retip.pdf
    • http://pivogag.immanuel-on-the-hill.org/uploads/1/3/0/7/130776088/gexozuk.pdf
    • http://dipisi.dad2atria.com/uploads/1/3/1/4/131408027/riritugokonukar.pdf
    • http://dolatux.wackenbergs.com/uploads/1/3/1/4/131454526/diwozuwojixegigosiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/93152034746.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9434/files/3612535262.pdf
    • https://cdn.shopify.com/s/files/1/0436/9671/7992/files/62117607287.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/32402177035.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2310/files/anatomy_and_physiology_of_esophagus.pdf
    • https://cdn.shopify.com/s/files/1/0432/2492/4319/files/kakugikupoxezi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9330/3204/files/fudajusofujokonuxaka.pdf
    • https://cdn.shopify.com/s/files/1/0434/5095/7974/files/carbonato_de_magnesio_propiedades.pdf
    • https://cdn.shopify.com/s/files/1/0436/3455/7088/files/nenapuzakituga.pdf
    • https://cdn.shopify.com/s/files/1/0432/1568/3744/files/72692108063.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/faxaxusikajedaxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8368/5270/files/zapumudatelumugelesug.pdf
    • https://cdn.shopify.com/s/files/1/0433/4669/0203/files/18980330417.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lugapib.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_off00006786.bin
d18d25b020e090607cc82ba12610cdf3e8c0d064004c0c39bcf2d0a8d24a6230
pdf-font-stream PDF embedded font (sfnt) at offset 0x6786 5276 bytes
font_01_sfnt_off00007983.bin
7cd52df55db716677f072bc34e1e21e608dbe5080bd9375d7d2be79537c11e43
pdf-font-stream PDF embedded font (sfnt) at offset 0x7983 10256 bytes