Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c4a02d5213d9c68…

MALICIOUS

PDF

50.9 KB Created: 2020-08-31 08:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e06617af15df715ab2807453d0a6773 SHA-1: 0153f05ae89f7ec50db895563dfd2aaeaa66ad85 SHA-256: 8c4a02d5213d9c68fb3c4909cdabe4824fb267fdf6d2da1ab8b294bd1147af33
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to a link farm hosted on static.usrfiles.com. One prominent link, disguised as a movie streaming service, redirects to ttraff.com, which is flagged as malicious. This indicates a social engineering tactic to drive traffic to potentially harmful sites.

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=watch+longhorns+movie+online+megavid
    • https://static.usrfiles.com/ugd/b8c837_747a42275f134dae8effc597c3b69d3d.pdf
    • https://static.usrfiles.com/ugd/b8c837_23fd4484a92a4616b0e93462d91a9c37.pdf
    • https://static.usrfiles.com/ugd/b8c837_96f1f79f01ab40d9b0803742480f2cd7.pdf
    • https://static.usrfiles.com/ugd/0a593f_4be5fe3b048b4a659661a532b7381059.pdf
    • https://static.usrfiles.com/ugd/22bf55_c87b4c05e693460a9f6d54e422717af4.pdf
    • https://static.usrfiles.com/ugd/b8c837_671c8c852bd8412b8eb3fa29d4ddc315.pdf
    • https://static.usrfiles.com/ugd/b8c837_80314a30d10c4facaac57f5f2912e18e.pdf
    • https://static.usrfiles.com/ugd/d01287_e93a17b2203c49bc8f15df377e229b04.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ff3186acd834b2e8529789e18225bd5.pdf
    • https://static.usrfiles.com/ugd/7e6083_a19da377b7bc48febf4abc6ebfc1ff34.pdf
    • https://static.usrfiles.com/ugd/b8c837_c76d37e2515a4a21b7f32e3888465f3a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6aae4917859e4932aac2d8b100caaea6.pdf
    • https://static.usrfiles.com/ugd/c8a981_969513b95d394b6f8cb53b017c632180.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_off000089a7.bin
6b9bebea71a589c91ade547e25eefd053a6bcf5a34968128027153fde2511dff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89A7 5428 bytes
font_01_sfnt_off00009bf1.bin
f7e69d4b0742cb95008bc3f3c6b59044010b16b8149854bbf88c7380037b49be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF1 10216 bytes

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