Malicious PDF — malware analysis report

Static analysis result for SHA-256 af63dd85f0ec3223…

MALICIOUS

PDF

44.3 KB Created: 2020-09-08 03:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5960eee936c75c61cc682ce70eb0c01 SHA-1: c197edce6b4b677caf63488a106b5c7db37204a0 SHA-256: af63dd85f0ec32234cd764d3b2b73604857ec7d690b10c420822b817391769fb
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=bartier+cardi+ft+21+savage+mp4'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links to external PDFs hosted on 'static.usrfiles.com'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=bartier+cardi+ft+21+savage+mp4
    • https://static.usrfiles.com/ugd/913720_af8a6cf289c54a6b8eedc2a16f17ee26.pdf
    • https://static.usrfiles.com/ugd/08fe48_7422971bdb574f829481ee670f7d61e7.pdf
    • https://static.usrfiles.com/ugd/3eed2b_98d4c87e7199497492d3de0fe3d8edc4.pdf
    • https://static.usrfiles.com/ugd/1479de_2112ace6baa54bfa8c6afcd628d255a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_f87842bb954040feacd7262a1cad6ae1.pdf
    • https://static.usrfiles.com/ugd/4c1554_7737fff2e93b40c28b07d61652c510fb.pdf
    • https://static.usrfiles.com/ugd/384ea4_4a48f22e836444dca2cda8177e5c6fe8.pdf
    • https://static.usrfiles.com/ugd/40512e_6c9f59c9c2b54607ba4bf8ed32a01305.pdf
    • https://static.usrfiles.com/ugd/0d9a50_7a7a3c43618545e0baab3295b2c43878.pdf
    • https://static.usrfiles.com/ugd/432b07_dfeeb7943c07474f87e25b9ac0ff584a.pdf
    • https://static.usrfiles.com/ugd/b972d5_e536a366a3ab44da911dff67515f97df.pdf
    • https://static.usrfiles.com/ugd/800b88_bae5ee6759884a819ca28b66ba0d8236.pdf
    • https://static.usrfiles.com/ugd/9e41f0_4eb66608fcc442038d865dc6f1053c10.pdf
    • https://static.usrfiles.com/ugd/99965f_4933263289564dd992f321434664ca90.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb86dd28dddd431db3c7d90919001e36.pdf
    • https://static.usrfiles.com/ugd/86319b_b06b1b4b37604bb1a9cdb781102ef9e0.pdf
    • https://static.usrfiles.com/ugd/3e9e83_c73202500c80499a9bd156d84dc4d7b4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b73.bin
2664fe5b1a48a468d7e20ae722d6931bfbf0f69ec83f6687a19788448862fc57
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B73 5824 bytes
font_01_sfnt_off00005f4e.bin
19f6edfe7a7c51bd1f7472db098daf144f46da9e7b59d16c586d1c8634c645d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4E 10584 bytes
font_02_sfnt_off00008366.bin
6c08e0233efb79b61015a1dd364986b531e8b0a4ebcb6ced17fd5a3159ba0295
pdf-font-stream PDF embedded font (sfnt) at offset 0x8366 19616 bytes