Malicious PDF — malware analysis report

Static analysis result for SHA-256 51267a6650e1e68e…

MALICIOUS

PDF

50.0 KB Created: 2020-09-06 19:55:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 822f64d25ded33f77cc56746582ac491 SHA-1: a02da7694bd6296977a666bc64d489796c7348a0 SHA-256: 51267a6650e1e68e27f5f994b0ff5c72aed170e072925a90c852f35ad09ce58d
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, pointing to 'https://ttraff.me/wix?keyword=formal+letter+template+malaysia'. This URL is embedded within the document body, suggesting a phishing or social engineering lure. The presence of a PDF link farm heuristic further indicates malicious intent, likely to distribute malware or redirect users to malicious sites. The document body itself is heavily obfuscated but contains the same URL, reinforcing the phishing pretext.

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=formal+letter+template+malaysia
    • https://static.usrfile
    • https://static.usrfiles.com/ugd/01bc73_b9d7b8dcaca64280a5a5e33d8a07d4f2.pdf
    • https://static.usrfiles.com/ugd/39cb9d_7e9c941a3fd44b9eb9252c8c5afc7b82.pdf
    • https://static.usrfiles.com/ugd/8bc2a6_6a19f5c524404817982f8dda22319216.pdf
    • https://static.usrfiles.com/ugd/9904c2_66f75044f49e48db8d2ef71c7031aad8.pdf
    • https://static.usrfiles.com/ugd/f63f29_31e55115ca7f4e1e8412246f7d34dcde.pdf
    • https://static.usrfiles.com/ugd/79e5df_a3f7369c6a9248fabc37e215079eb08b.pdf
    • https://static.usrfiles.com/ugd/99965f_63d161e5615b4ec98947a6fff94479d9.pdf
    • https://cdn.shopify.com/s/files/1/0435/2439/1067/files/82210053490.pdf
    • https://cdn.shopify.com/s/files/1/0469/0257/5266/files/tim_hsu_san_jose.pdf
    • https://static.usrfiles.com/ugd/735189_ba3f5aef61394bcca9cab9a3934dca28.pdf
    • https://static.usrfiles.com/ugd/ccb1c6_c52802193cd94f8aa72b35ebc85ce63a.pdf
    • https://static.usrfiles.com/ugd/4f270c_680cac7a14e84356828e11060f11b203.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_off0000875d.bin
5fe4c9b26d128294938930370c6865f518584e105f3187272587db41e72da96a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x875D 5020 bytes
font_01_sfnt_off00009862.bin
f8847e7f7cebf5e7f63db2ab9351bc63b11c2dcf99022546cdbbebf3b28f163f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9862 10240 bytes

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