Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6958a74d3aca20…

MALICIOUS

PDF

38.5 KB Created: 2020-08-31 04:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 788ff09227c4c47544504c8f036a9263 SHA-1: 35926d5f3b3c61250f5da0e3f6e18a873a3dc9f7 SHA-256: 3a6958a74d3aca20d46c7245bd037669da6a21210b327cf988ad72dc40582ef0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified as a PDF link farm. One of these links, 'https://ttraff.cc/wix?keyword=all+we+know+chainsmokers+320kbps+download', is flagged as a malicious redirector. The document body appears to be a lure related to a song download, further supporting a phishing or malicious redirection 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.cc/wix?keyword=all+we+know+chainsmokers+320kbps+download
    • https://static.usrfiles.com/ugd/fef806_0a6362398d3d4ca6a902c391e1757813.pdf
    • https://static.usrfiles.com/ugd/9757e7_b16807c8a3114ee3bc30286e39fc9190.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e001332d39b4cd69e54935833f64099.pdf
    • https://static.usrfiles.com/ugd/b7ed05_130856f3770d4db4bd86949d101e6e4a.pdf
    • https://static.usrfiles.com/ugd/345929_51903153b3954dd8927b46ef74f3dc11.pdf
    • https://static.usrfiles.com/ugd/1f2646_f21ed0e4de6b4713b520ae11dabcd919.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a7ab4fa13ef4a3381c92a1aa9ddd512.pdf
    • https://static.usrfiles.com/ugd/704566_b717c392bc454c4e83360d1967f165f2.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/resozelofik.pdf
    • https://cdn.shopify.com/s/files/1/0437/3859/5482/files/zusatenepi.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_off00005071.bin
c20a2e33aea47406b585cfb63772a85d0cebdab5e7bdd952938b6c68c45c5c18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5071 6036 bytes
font_01_sfnt_off000064c9.bin
17e2fd795bf0707bcb4f885cf449d978f62ff548f940ecaba3abf2f34ee05e91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64C9 14280 bytes

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