Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f67999e4a68615…

MALICIOUS

PDF

37.3 KB Created: 2020-08-24 09:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7236e5e6f0b67b52802630753dae652 SHA-1: b2ee42104ee716a6755872f885081a88bbdbdd79 SHA-256: e2f67999e4a68615b581a6724013f9f0900d6faa1cf8e2e382a8d5117b833afc
162 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify-hosted PDFs, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Vce exam simulator' and the malicious URL, suggesting a lure. The presence of a password archive lure heuristic indicates the document may be part of a multi-stage attack where the actual payload is encrypted.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/pify?keyword=vce+exam+simulator+2.+6.+1+free
    • http://ginud.asianvectorgroup.com/uploads/1/3/1/1/131164250/f05e7911a66d576.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/15916843250.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/angularjs_library.pdf
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/2182196584.pdf
    • https://cdn.shopify.com/s/files/1/0431/0243/7527/files/92224195586.pdf
    • https://cdn.shopify.com/s/files/1/0455/6609/9621/files/32887026584.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/gunobiwimad.pdf
    • https://cdn.shopify.com/s/files/1/0441/3367/9256/files/dozidanokakizozadeki.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/wumibexarerezabad.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/batch_file_commands_list_with_examples.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_off00005271.bin
f7f3b3d773b5886b0b2512870d60b46923a878db397c73f1fccf1b3302738a3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5271 5432 bytes
font_01_sfnt_off000064df.bin
0e73e17d78a2f169b00a79aad3591f0eb65440681b98982bf46925967d69d902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DF 10464 bytes

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