Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc5c47af30c07cf…

MALICIOUS

PDF

87.3 KB Created: 2020-09-09 12:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de0384cf3a67d53606e76b2ac2025019 SHA-1: 865649f516b92248257b286952daa7e7e2cd1fc5 SHA-256: 1fc5c47af30c07cfeea1abf6a2c1a794b35d803b7ebee770609d8d3b85dd8cd2
128 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL that is also flagged as a malicious redirector. The PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, likely for SEO manipulation or to host further malicious content. The SE_DOWNLOAD_BUTTON heuristic indicates a call-to-action phrase was present, reinforcing the lure.

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=intel+dh61ww+bios+update+free
    • https://static.usrfiles.com/ugd/234f58_edd4baa9c6d5433e9848aded3f13908d.pdf
    • https://static.usrfiles.com/ugd/d43733_613a3e3bf6ae4eb8a9424b2423aa3ca0.pdf
    • https://static.usrfiles.com/ugd/956c05_d89e9802aacb4b04bb56d91da4624312.pdf
    • https://cdn.shopify.com/s/files/1/0459/2451/5989/files/13789296586.pdf
    • https://cdn.shopify.com/s/files/1/0437/4816/3735/files/98812919937.pdf
    • https://cdn.shopify.com/s/files/1/0434/3224/7445/files/sinunugixasederomupusa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3564/8409/files/gofumivaparimoveg.pdf
    • https://static.usrfiles.com/ugd/9757e7_0100e28f87d94c37b5806d962b110aa4.pdf
    • https://static.usrfiles.com/ugd/a0905b_941c460103144b9e8253181ed17fbed3.pdf
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/android_avd_emulator_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/paretajapamuvolux.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/atlas_of_regional_anesthesia.pdf
    • https://cdn.shopify.com/s/files/1/0438/5131/7408/files/pixaja.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_off00010b99.bin
967d3c8bca59e7c4c16c8f21513839ad37b77f2a2dd2bf94dceba6cadd78f37b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B99 5504 bytes
font_01_sfnt_off00011e58.bin
1566e038c92aa728ac0e53eba24cd7f4f0354d5ed31576dfbc710ce134997d9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E58 15596 bytes

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