Malicious PDF — malware analysis report

Static analysis result for SHA-256 593817c53601443d…

MALICIOUS

PDF

38.8 KB Created: 2020-09-01 02:38:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1000cbdd0298ddb73ff381a5a0228b07 SHA-1: 65d5812268126083c6c5d4ee263f8ec06f9bdab6 SHA-256: 593817c53601443d07d8bb3492aa974de55c745a158411755c4ba64a93c3ca8c
128 Risk Score

Malware Insights

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

The PDF file contains a link disguised as a download for a calendar, which redirects to a malicious URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this malicious redirection. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites. The presence of a download button lure further supports the social engineering aspect of this attack.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=printable+2019+calendar+canada+pdf
    • https://static.usrfiles.com/ugd/f515ca_201e8eaed7984294b413d87354f25b1c.pdf
    • https://static.usrfiles.com/ugd/6cfc61_c90d0d2e293e448784e2638bfcde00fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f98010e7f1a449c86d15ffb029b3a66.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/diamond_amulet_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0454/5812/9054/files/mozobexutikuva.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/lofoguridu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4061/8134/files/arcgis_online_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7621/files/48168249850.pdf
    • https://cdn.shopify.com/s/files/1/0433/9410/5509/files/sistema_respiratorio_fisiologia.pdf
    • https://cdn.shopify.com/s/files/1/0437/6995/4456/files/72419709898.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3383/files/zemevulifuzevexetetusev.pdf
    • https://static.usrfiles.com/ugd/b8c837_9585a4372f034e088ff4e54519a577d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bdce39293c54a7a9f3752d5b4024c03.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_off00005791.bin
f7f3e563c378c3746930534b706d76d1399bcb54debf0d31c20f2df1b56235cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5791 5596 bytes
font_01_sfnt_off00006a9c.bin
8a8cd7850871819f06b7324e65b3f652c2b963a7a81d252ad598215652d28f02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9C 10604 bytes

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