Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66d9588ac78dd39…

MALICIOUS

PDF

40.1 KB Created: 2020-08-29 05:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d4e03459d74e28e203dfa2123358cc3 SHA-1: 109e8e8c0d82b3be19aa58b1e9a39111196c10fa SHA-256: c66d9588ac78dd395f3f65ad8d3539b8c5f59d32d9ba472843ccf6fcba892e8b
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, with a critical heuristic firing for PDF_SEO_LINK_FARM. One of these links, https://ttraff.cc/wix?keyword=libro+modelo+canvas+pdf, is flagged as a malicious redirector by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The file was generated by wkhtmltopdf, a tool often used to create PDFs from web content, which may explain the large number of links.

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/wix?keyword=libro+modelo+canvas+pdf
    • https://cdn.shopify.com/s/files/1/0440/8924/5861/files/22191085612.pdf
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/72496606507.pdf
    • https://cdn.shopify.com/s/files/1/0432/9082/0774/files/yuri_stab_gif.pdf
    • https://cdn.shopify.com/s/files/1/0434/2952/7709/files/malaguena_tab.pdf
    • https://static.usrfiles.com/ugd/b8c837_a58955b17278475283872132fe14e640.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbf301310c37449da8ce013044bda3e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_12cdad824b15451aa7f3ac4998643da9.pdf
    • https://static.usrfiles.com/ugd/b8c837_109163e0a77c40919393e58b29782ac3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2897f64348bb49408520d58ad836a485.pdf
    • https://cdn.shopify.com/s/files/1/0437/4609/9349/files/physics_constants.pdf
    • https://cdn.shopify.com/s/files/1/0462/7863/9776/files/tuguvunamoxasixegurun.pdf
    • https://cdn.shopify.com/s/files/1/0432/9468/7400/files/kexepo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/46654895573.pdf
    • https://cdn.shopify.com/s/files/1/0432/6644/1376/files/xupefagamo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7806/5055/files/jodunepibaledumatuza.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_off00005f16.bin
3705f6fbd737daeedbd757820e572d970ccf6b2ffaee0fb8a21bf97b47c096d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F16 5440 bytes
font_01_sfnt_off0000717b.bin
e9ef62255e8ed5186ec13f71e91bd753e6b18276ef0b4c571cd8906589b8df38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x717B 10232 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.