Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc6fdb603a93b5f…

MALICIOUS

PDF

53.1 KB Created: 2020-08-21 10:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dbdc95dde172f2fa4085f741ba39a8d SHA-1: 72711d518533a56689f737552d3a527bdfc0af50 SHA-256: 8cc6fdb603a93b5f86bcc51629090ba181f4edd140abf490cc52ab4ff298fb73
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.003 Windows Command Shell

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The document body, though corrupted, contains a URL that is also present in the heuristics. The presence of a 'Clipboard command execution lure' heuristic suggests the document may instruct the user to interact with the command line, potentially to download or execute further payloads from the linked sites.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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=corona+sdk+platformer+tutorial
    • http://voniguv.gtcateringandevents.com/uploads/1/3/0/7/130775451/2328506.pdf
    • http://files.norfolkeventmedicalservices.com/uploads/1/3/1/3/131380258/jarilanopuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/4600/8982/files/75161280185.pdf
    • https://cdn.shopify.com/s/files/1/0445/6851/0628/files/5317684629.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/36637868837.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/free_printable_synonym_worksheets_for_3rd_grade.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/periodic_and_aperiodic_signals.pdf
    • https://cdn.shopify.com/s/files/1/0431/0584/5397/files/96687466477.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/tulelozuxoguribetinep.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_off00008a41.bin
16df505b8c51e3dfff559ff1293102d66c87a940a0098f9a053baf021cbe07c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A41 5156 bytes
font_01_sfnt_off00009bae.bin
51ef6027a2f87e1390e4a5291033efb8f26a7ac570972642313a8ac35dfd221a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAE 14360 bytes

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