Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff218c902780e1e…

MALICIOUS

PDF

44.3 KB Created: 2020-08-16 15:28:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bfed4513fc8491402a0a929d2c35517 SHA-1: 808bf4dbe5a3f95edf17dcd0e982bd1716188cda SHA-256: eff218c902780e1e2ff300acb59e1728a4072705693fc7db2ba86377a5772bb6
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to academic marks and a URL that matches the malicious redirector. This suggests the document is designed to trick users into visiting the malicious URL, likely for phishing or malware distribution.

Heuristics 3

  • 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.
  • 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=ap+ssc+marks+memo+duplicate++2017
    • http://files.aedsa.ca/uploads/1/3/1/3/131380258/0eb8f430b596ac.pdf
    • http://files.fiordamalfi.com/uploads/1/3/1/8/131871419/badidud.pdf
    • http://files.poetryandmemory.com/uploads/1/3/1/6/131607131/bdf4a1d.pdf
    • http://files.hebsolutions.org/uploads/1/3/2/6/132683224/1330345.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/guserodimojizupile.pdf
    • https://cdn.shopify.com/s/files/1/0436/3524/5214/files/6384265197.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65022979336.pdf
    • https://cdn.shopify.com/s/files/1/0432/3144/5149/files/wabagadupazotitobidu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8102/4159/files/22450387366.pdf
    • https://cdn.shopify.com/s/files/1/0452/6299/5618/files/basogolukepipevapomo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6703/8109/files/xupubavadimul.pdf
    • https://cdn.shopify.com/s/files/1/0444/8894/9927/files/blockchain_basics_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/96327577692.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/gudibofutowofeguvazexitu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78985131446.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_off00006efe.bin
8488324fbf81c48896fa150517945392aef08cee905971834967875c83c7e773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFE 5676 bytes
font_01_sfnt_off00008233.bin
1981f37c49f7aa735cddd9b164b496c74686fc5adac9e49d68809b571e30acd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8233 10084 bytes

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