Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a86754f0485029b…

MALICIOUS

PDF

36.9 KB Created: 2020-07-30 02:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b0e1fdfa2ee8df6e64d035a8cf2cf00 SHA-1: f00a44ca12b2e2a11b4e1b29e430c6324ef54689 SHA-256: 3a86754f0485029b1e75da47ab297424b3271c94f2087f9d087673255a291464
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, suggests a lure related to 'exercises pdf'. The presence of a link farm and a malicious redirector indicates a phishing or malware distribution attempt.

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=causative+have+all+tenses+exercises+pdf
    • http://files.christinekingcounselling.com/uploads/1/3/1/6/131636682/4b83bef48ff7ad2.pdf
    • http://files.driversedgrades.com/uploads/1/3/2/6/132696267/suxaki.pdf
    • http://files.silfradentasia.com/uploads/1/3/2/6/132682723/a25fbf0.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/14015257259.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1149/files/piwesozipe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3910/3912/files/maxezof.pdf
    • https://cdn.shopify.com/s/files/1/0432/1571/6516/files/61028817292.pdf
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/nifadijixabixonilu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6974/4028/files/98079917192.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/rolobonifoledoro.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/nuxaxewubofimakusadi.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/dinirodifawake.pdf
    • https://cdn.shopify.com/s/files/1/0428/1024/5286/files/47685037677.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/
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/nifadijixabixo

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051f1.bin
de0186881221cf1d9426f232c7543475785f4a9dd469684167e20a59d063cd63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51F1 5164 bytes
font_01_sfnt_off00006381.bin
d1a9820c2e2fd4da17bf71bbbb4c22db220c267b56f998fd0b8c54fb288b3d5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6381 10332 bytes

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