Malicious PDF — malware analysis report

Static analysis result for SHA-256 84335bf17c64da2e…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 21:41:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b64fc37f8a58a1982aaf33bf7c45f47 SHA-1: f0ca9a350871b47ad1f4ee07260f382daebaeed6 SHA-256: 84335bf17c64da2e19d5c2861c52663ee46ec89b89dada62b94cbc74d3fc49c6
120 Risk Score

Malware Insights

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

The PDF file was generated by wkhtmltopdf and contains a large number of embedded links. One of these links, 'https://ttraff.club/wix?keyword=the+psychology+of+the+transference+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain this URL and references to PDF documents, suggesting a lure to entice users to click the malicious link. The presence of numerous links to static.usrfiles.com, while benign, indicates a link farm strategy.

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.club/wix?keyword=the+psychology+of+the+transference+pdf
    • https://static.usrfiles.com/ugd/538d67_a5d5dfcafe6d42f683af47930f991ee4.pdf
    • https://static.usrfiles.com/ugd/7baf93_bd22c9cc15784270aac011dbd77d3de1.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed426657fc0c469bba22da7019b26597.pdf
    • https://static.usrfiles.com/ugd/2e16aa_513dd9d0b1ab4a2e98740beb0e6cbce3.pdf
    • https://static.usrfiles.com/ugd/b8c837_a32b667547324476903e0ce391f8835c.pdf
    • https://static.usrfiles.com/ugd/f4de5e_427d38b4fdf846379bc4adb246b64bae.pdf
    • https://static.usrfiles.com/ugd/822ecd_b0776de262a743219290dfc971b77fa7.pdf
    • https://static.usrfiles.com/ugd/b8c837_5671c48fa6b54474b557c66f84927911.pdf
    • https://static.usrfiles.com/ugd/b8c837_15391b1509634ac7be1bed88aeae6e23.pdf
    • https://static.usrfiles.com/ugd/b91566_53c2a449c09f470ebd388076a8176fea.pdf
    • https://static.usrfiles.com/ugd/c618e9_6959108ac38d443195ff2ae9af24f166.pdf
    • https://cdn.shopify.com/s/files/1/0431/8062/1984/files/vikekowejoduwotarutar.pdf
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/nemukimatoropedutebod.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/qa_analyst_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/9055/8622/files/avamys_patient_information_leaflet.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_off00006921.bin
74a5d74a31ed9593678e7888d8bf16b8cf8c7105722e4d6f58a0c6edcaed44f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6921 5468 bytes
font_01_sfnt_off00007bb5.bin
851baad75298bd852cf30d3141d9aa1ba9d3fa2b8441b4928595a5c60dd71a10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB5 10116 bytes

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