Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3276f47381a48d…

MALICIOUS

PDF

71.6 KB Created: 2020-08-05 04:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b79f3a3826d25afaa1670399e0d88c9 SHA-1: f87483e7cd9205736b0c5d7a29a9d2820110b27f SHA-256: cd3276f47381a48d322758a64c495e206f49f05d0785e628caf4972ca7b313b7
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=educaci%25C3%25B3n+y+neoliberalismo+en+m%25C3%25A9xico+jaime+ornelas+delgado+pdf'. The document body, though partially corrupted, also contains this URL, suggesting it's the primary lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to obscure the malicious redirector. The PDF structure indicates it was generated by wkhtmltopdf, a common tool for creating PDFs from web content, which can be abused for malicious purposes.

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=educaci%25C3%25B3n+y+neoliberalismo+en+m%25C3%25A9xico+jaime+ornelas+delgado+pdf
    • http://files.darkrisingseries.com/uploads/1/3/0/7/130739747/kejatogadis.pdf
    • http://files.ziqixie.com/uploads/1/3/0/9/130969572/pumedugux.pdf
    • http://files.jimmylbryanjr.net/uploads/1/3/0/8/130814085/bukala.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61051106257.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajakeveposemilakojataza.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80787326618.pdf
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/4672051720.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pagujusevidunevaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/987910438.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/5274178638.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/dolovikawepobenegipatim.pdf
    • https://cdn.shopify.com/s/files/1/0434/2684/0737/files/99865011706.pdf
    • https://cdn.shopify.com/s/files/1/0432/2898/7547/files/54287937193.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1567/files/suvasosawuwulep.pdf
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/12539748254.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5d2.bin
1855a047eeda8715bf4a49fbef0f9372c10047dc803803b00f658f352a23e47b
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D2 5900 bytes
font_01_sfnt_off0000d94a.bin
73943c69f9535c25f9ee57fe4a8641a0c678ad1b3afb483251cbf278903bf5b9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD94A 12100 bytes
font_02_sfnt_off0000ffff.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFF 4324 bytes