Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3eba7835df6f093…

MALICIOUS

PDF

59.9 KB Created: 2020-08-14 07:34:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65e480d32294b8e787b16064cf77e1f9 SHA-1: c533b918005a5013273efc3c7f3feb4f271cb4c8 SHA-256: c3eba7835df6f093dc6edc97db33c4d0c1a01b645a722837cfa75aed5473d606
160 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are hosted on Shopify but also include links to potentially malicious domains. One critical heuristic indicates the presence of a malicious redirector link pointing to 'ttraff.ru'. Another heuristic flags the document as a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. The presence of a 'Visible LOLBin command execution instruction' heuristic suggests that the document may also contain embedded commands or instructions intended to be executed by the user's system, likely to download and execute further payloads.

Heuristics 4

  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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=conclusion+for+lab+report+animal+tissues
    • http://pemoxot.deanarohlinger.com/uploads/1/3/2/6/132682883/0af7760.pdf
    • http://files.ourcurlsinc.org/uploads/1/3/1/8/131856065/91c117f.pdf
    • http://files.nourishnotdiet.com/uploads/1/3/0/8/130874134/8594328.pdf
    • https://cdn.shopify.com/s/files/1/0436/0660/5987/files/17790130625.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/arquitectura_moderna_desde_1900.pdf
    • https://cdn.shopify.com/s/files/1/0436/5346/4214/files/76624822499.pdf
    • https://cdn.shopify.com/s/files/1/0438/0806/3649/files/46874467680.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8970/files/fejide.pdf
    • https://cdn.shopify.com/s/files/1/0450/5364/0856/files/30_rock_script.pdf
    • https://cdn.shopify.com/s/files/1/0434/2510/4028/files/budopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/fukifujutozazetemosiku.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7033/files/61812247979.pdf
    • https://cdn.shopify.com/s/files/1/0431/0695/9514/files/buyers_guide_used_cars.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/tekovon.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/43534002387.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_off0000ad3f.bin
c2516a290c78c74a1718a9874fb50fb9c9ddee3c825bb1a485f1550fe24128a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD3F 5208 bytes
font_01_sfnt_off0000bed3.bin
8febfed8b37aa25462b8440cc06edf446a9bac3f037de2d6261fba58d0921b0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xBED3 10572 bytes