Malicious PDF — malware analysis report

Static analysis result for SHA-256 c085731d6b8b3121…

MALICIOUS

PDF

40.7 KB Created: 2020-08-29 11:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66455e76828de8d7125346a99519d68d SHA-1: a433ba3f3e936402fa3c16fac04b81949f3abddc SHA-256: c085731d6b8b3121694213e263b53b8b0ce26db315ea2c8ab7c4fb841c8eae6a
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=total+gym+1000+exercise+chart+pdf'. Additionally, it features a mass external PDF link farm, with many links hosted on 'static.usrfiles.com'. The document body, though heavily corrupted, contains fragments suggesting a lure related to 'Total gym 1000 exercise chart pdf'. The combination of these factors indicates a malicious intent to redirect users to potentially harmful content.

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.cc/wix?keyword=total+gym+1000+exercise+chart+pdf
    • https://static.usrfiles.com/ugd/b8c837_d737563b42a04be5abeee63692d8e53d.pdf
    • https://static.usrfiles.com/ugd/b8c837_84e9cb0a2e9c485fb7883d8ff08fdfe1.pdf
    • https://static.usrfiles.com/ugd/b8c837_5821d415909b4f61ab7b9cee2c2f7bcd.pdf
    • https://static.usrfiles.com/ugd/b8c837_99ea93d438a34e9a980688eeb3c53495.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5333afdbc4d48c2979e4d8585a24a4f.pdf
    • https://static.usrfiles.com/ugd/b8c837_396629ec99d94ffd808ba9b983161948.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ae6d2a5e5e34f3da6fda562755ab7c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6d66ea31c294f89a55c36c7e42c774b.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e54699645d54269996cf0b09f1df699.pdf
    • https://static.usrfiles.com/ugd/b8c837_8df28bd05ccb41a399151a157c93f8d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_79205009721042c7a088d05b4efaf80a.pdf
    • https://static.usrfiles.com/ugd/b8c837_16b30f68576a4f64a3256c12a3b64e22.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd4241b57a8d4823a858e18bfd4f8e52.pdf
    • https://static.usrfiles.com/ugd/b8c837_d338ef3bfea54650b258c3a3c51d4b70.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6a9e8a912694c90b04776d45c4eebdb.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_off00005f42.bin
12b2c653e5f2771c7a7e94b4c03a2085fa41763093825ccdad6f9c37168b8de8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F42 5880 bytes
font_01_sfnt_off00007333.bin
259337159af1a614b0e4bf177c844a95217f702a8b1c3997005eb749b95b81ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7333 10272 bytes

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