Malicious PDF — malware analysis report

Static analysis result for SHA-256 a77254f491082bfe…

MALICIOUS

PDF

34.9 KB Created: 2020-08-17 16:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff82cd3de25815e297d54d2ed44f07d8 SHA-1: e1251a7b9764caa8c9ad5a3be137aef1f2b25c12 SHA-256: a77254f491082bfeee2f1adde9f598915c5f7ec36018d12c558db6fc00040292
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final destination of the malicious payload. The document body, though obfuscated, contains the same title as the malicious URL's keyword parameter, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation or to host further malicious content.

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=amount+of+substance+questions+and+answers
    • http://gixoser.merakiandcoffee.com/uploads/1/3/1/3/131398560/a8f1d36364b20.pdf
    • http://files.yarienaraujo.com/uploads/1/3/0/7/130776499/4141436.pdf
    • http://pivuvaf.juliaperdrial.com/uploads/1/3/1/4/131406390/minaxokipes.pdf
    • http://jofozesol.guidingstarastrology.com/uploads/1/3/2/7/132740965/292e7201de9783.pdf
    • http://files.unbridleddesignz.com/uploads/1/3/1/3/131383467/ed52aae852bf.pdf
    • https://cdn.shopify.com/s/files/1/0439/7809/6798/files/define_ergonomics.pdf
    • https://cdn.shopify.com/s/files/1/0432/3953/8851/files/bepifekak.pdf
    • https://cdn.shopify.com/s/files/1/0428/2246/7750/files/molulovuvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3253/files/tafesiwumab.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/77537935673.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/mugekavalaxufuvetukifuku.pdf
    • https://cdn.shopify.com/s/files/1/0439/7613/0718/files/wanted_dead_or_alive_tab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/2609433332.pdf
    • https://cdn.shopify.com/s/files/1/0431/1256/2849/files/durunekudezezijisugasiteg.pdf
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/pimevudubabovu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9728/3992/files/jeevan_shanti_form.pdf
    • https://cdn.shopify.com/s/files/1/0439/4464/0667/files/27852566445.pdf
    • https://cdn.shopify.com/s/files/1/0435/2717/6344/files/buludix.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_off00004ab8.bin
368b1507644727f3610ac1e1ddc8cff16688c3ab45ea2f3403cb63656fe1e5a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4AB8 5484 bytes
font_01_sfnt_off00005d4f.bin
292da5ead0c33c83337d77f6ce65d92b2fa67c525d3acc9e4077d7b9cd2a0445
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4F 9728 bytes