Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1be24fc1d5776c4…

MALICIOUS

PDF

39.5 KB Created: 2020-08-31 10:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f30308e3ffa487ab7a1fbb7eb1da23c SHA-1: 0deec5f2dfd720d71e441713f5075a58bee4e678 SHA-256: e1be24fc1d5776c44330d98118b7fe1f4516ac190d9bdb4463a3f15ccf69f6cd
120 Risk Score

Malware Insights

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

This PDF document was identified as malicious due to the presence of a large number of embedded links. One critical heuristic firing indicates a PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.link/wix?keyword=pe+chemical+review+manual'. Another critical heuristic, PDF_SEO_LINK_FARM, confirms the presence of numerous external PDF links, with 'https://static.usrfiles.com/ugd/55f640_8f27667868144af493998cfe24ddb468.pdf' being the first identified. The document body contains obfuscated text and the same malicious redirector URL, suggesting 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.link/wix?keyword=pe+chemical+review+manual
    • https://static.usrfiles.com/ugd/55f640_8f27667868144af493998cfe24ddb468.pdf
    • https://static.usrfiles.com/ugd/760101_7db9fed78c0641679dee3352c2c35c89.pdf
    • https://static.usrfiles.com/ugd/99965f_93f5af7577d841cdb6fe420424195760.pdf
    • https://static.usrfiles.com/ugd/856cea_b922427d7bc8475fb6673e73c14a70cf.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_0826c3332593442bb6e45a1991afdc05.pdf
    • https://static.usrfiles.com/ugd/82e28d_761f9a5728c34367a31115fd36651fd2.pdf
    • https://static.usrfiles.com/ugd/4b7290_6ed3eb619f814b75afa3247b1d0d3735.pdf
    • https://static.usrfiles.com/ugd/e1c37d_0d6a79be7d424daebcc7008f2f6d59b8.pdf
    • https://static.usrfiles.com/ugd/9c0842_b24162823f104a5784534c6b00a2240d.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7591/files/sekiro_fat_wax.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_off00005c0d.bin
7047db4a23a1bc398f13333bf421e1f5463b885dc397ba5cb7637ae7be0b4cf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0D 5016 bytes
font_01_sfnt_off00006d00.bin
ed066a559d75f6bec92dacf2ce8c62776a28908ae578bd86043a2be7893c44ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D00 10880 bytes

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