Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3943fe544be7793…

MALICIOUS

PDF

46.8 KB Created: 2020-08-30 23:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d51e786a94933e466a84534307fc2f4 SHA-1: 5e70dfe89f160e3d5dbedebf70c0c31778cd94a5 SHA-256: b3943fe544be77931230b208933b76a616eb4c20b6385e78645541b5912221cc
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/wix?keyword=prince2+ebook+pdf+download'. This URL is presented to the user as a download link for a Prince2 ebook. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to static.usrfiles.com. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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/wix?keyword=prince2+ebook+pdf+download
    • https://static.usrfiles.com/ugd/4b7290_f1aacdc08817471593ceeed41fc44dda.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa4dd01df3d74322ad5c01dde2f8755a.pdf
    • https://static.usrfiles.com/ugd/b8c837_9bd70585d6d14b55b562ffd30a412f7e.pdf
    • https://static.usrfiles.com/ugd/40512e_53a1565cec7c4f0084f0238ef436e426.pdf
    • https://static.usrfiles.com/ugd/b8c837_edbf9d3e982a4cc5be79995981a2a573.pdf
    • https://static.usrfiles.com/ugd/b8c837_c44407b9b901460694c3080e5b5616a2.pdf
    • https://static.usrfiles.com/ugd/40b9e6_65d6e722c8ed477481761216f1361096.pdf
    • https://static.usrfiles.com/ugd/0047a4_f39153c0e5604a21a3d8c12585680f1e.pdf
    • https://static.usrfiles.com/ugd/0d002d_a81081c814e142978e394f41b14add32.pdf
    • https://static.usrfiles.com/ugd/b8c837_1de3566b0fd0421b93de172b59c58feb.pdf
    • https://static.usrfiles.com/ugd/b444d4_ea5145bb24f04b6c94b51992cc04d0a6.pdf
    • https://static.usrfiles.com/ugd/ad2ade_d41ab31e1bf44007bd811234b561c9cc.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_04b3a8fbc2844310896e0eef17109355.pdf
    • https://static.usrfiles.com/ugd/b8c837_b22a068bcf0949e3abe4af7e7f038f4d.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_off00005d7b.bin
1d332a9fba8909ecd69d7d35f60c19211a9ceffbcbfc58aa2b9fcc031caa0950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7B 5400 bytes
font_01_sfnt_off00006fe3.bin
bc275076ee5877fbfabf6e211d2eddc2e45fda4077bac5937d80ffe1682dff5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE3 10500 bytes
font_02_sfnt_off000093ff.bin
f610a9b2008b55dac58b9350b0c1d59b5925050a1329db8da7b92fc8e86c78c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93FF 17588 bytes

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