Malicious PDF — malware analysis report

Static analysis result for SHA-256 a661a66fc359ab3e…

MALICIOUS

PDF

47.6 KB Created: 2020-08-31 19:48:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79f820c4438a6cbc3dca678add3279cb SHA-1: 9c83fab402184918c8b50c26929df2558183d259 SHA-256: a661a66fc359ab3e314a45527311c588cd9cc3bb9c3f07fa0fc3b1d7eeab3fa0
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.me/wix?keyword=asset+allocation+performance+chart'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many pointing to static.usrfiles.com. The document body, though heavily obfuscated, contains the same redirector URL, suggesting a social engineering lure to trick users into visiting a malicious site.

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.me/wix?keyword=asset+allocation+performance+chart
    • https://static.usrfiles.com/ugd/158fb9_f3ce396c07f5485284a8e921c13a7a2e.pdf
    • https://static.usrfiles.com/ugd/0f5b72_6a653a8dc10c4e90a5c99056d3409624.pdf
    • https://static.usrfiles.com/ugd/3aee12_c31e81fb5803410da5e139642ff8cb83.pdf
    • https://cdn.shopify.com/s/files/1/0428/9832/5671/files/50541840681.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1515/files/kidot.pdf
    • https://cdn.shopify.com/s/files/1/0435/2199/9008/files/antigenic_drift_and_shift.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/dikepudiput.pdf
    • https://cdn.shopify.com/s/files/1/0431/9815/2866/files/lsi_sas_3000.pdf
    • https://static.usrfiles.com/ugd/469aea_de3dedcec900499bb7c73b164d811947.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf71010f633e4f8f9dcf5413e4d7993d.pdf
    • https://static.usrfiles.com/ugd/b7ed05_bd882d07c42d4a809343639f1664a486.pdf
    • https://static.usrfiles.com/ugd/5af86b_3f3507a73c6641789397ce3e82152d16.pdf
    • https://static.usrfiles.com/ugd/41a0b6_c7a63038041441eb8e9e6d25a55ee242.pdf
    • https://static.usrfiles.com/ugd/b8c837_70c57db51c4244df93590711178b9b6b.pdf
    • https://static.usrfiles.com/ugd/de02f3_475ad7c779b14db78eaf2aa78688dc1c.pdf
    • https://static.usrfiles.com/ugd/ab922d_486e3315570945ca80750bfcab439908.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_off00007214.bin
c69abf40953ca82e9d61848ce4550bcd2b2f7b27b330cfea1ee45b82692cc9cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7214 5244 bytes
font_01_sfnt_off000083c2.bin
a633f3890cf7446e069524ae9e9f6add70fa5b423a27abf056d381a6890c552b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C2 14556 bytes

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