Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4e3b0d8410470f…

MALICIOUS

PDF

54.5 KB Created: 2020-08-26 11:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f7b19749333966c88443377457c3deb SHA-1: 3e83ce3068769a2f5329ba54564ac7ce00331309 SHA-256: 8a4e3b0d8410470f7953b86535834c92572fc540c8041e2f1faff9a4bba0567e
160 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, likely to trick the user into downloading malware. The document body and heuristics indicate a lure for 'Corel draw portable x3 64 bit'. The presence of a password-protected archive lure suggests the actual payload is hidden and encrypted. The PDF also hosts a link farm, pointing to numerous other PDFs, likely for SEO poisoning to increase visibility.

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.com/pify?keyword=corel+draw+portable+x3+64+bit
    • http://files.alamowebwrite.com/uploads/1/3/0/8/130815009/4101570.pdf
    • http://files.2k9petservices.uk/uploads/1/3/0/8/130873732/rebavuvova_jonerako_piraxoxuwipeto_jomez.pdf
    • https://cdn.shopify.com/s/files/1/0431/2665/3090/files/fasebat.pdf
    • https://cdn.shopify.com/s/files/1/0432/1617/5263/files/material_ui_react_native_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/3924/3943/files/jsf_number_format_converter.pdf
    • https://cdn.shopify.com/s/files/1/0441/2728/9496/files/votogekapaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8683/files/policy_cancellation_letter.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3661/files/relut.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9287/files/65426465200.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/nusawilup.pdf
    • https://cdn.shopify.com/s/files/1/0432/1083/4077/files/ca_course_details.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_off000096c6.bin
39d11afa63e446e2be9ccedbf87320402e20f0f4be969739b3f989118dbc8c99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C6 5388 bytes
font_01_sfnt_off0000a93b.bin
add7b91a35ab22810e0b501ea952125196e1c33408aeeb46df3f1b6e51f0ff09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA93B 10600 bytes

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