Malicious PDF — malware analysis report

Static analysis result for SHA-256 87fca5cee9753571…

MALICIOUS

PDF

65.2 KB Created: 2020-08-19 03:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03cfaff0f23e1dcff78787ec3971fecb SHA-1: 3e5bcfaab0678e68020966baa758198f75a4f71f SHA-256: 87fca5cee97535713075466d70aedfd53610311c964705f849897d8707299568
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=additional+information+about+black+body+radiation'. It also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on shopify.com. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=additional+information+about+black+body+radiation
    • http://getit.muskegonbibleinstituteinc.com/uploads/1/3/1/4/131437736/3920375.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/spotify_playlist_to_itunes.pdf
    • https://cdn.shopify.com/s/files/1/0445/2735/4015/files/saxon_math_course_3_test_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/5124/5987/files/rakobaxovikimiwezaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/75199217057.pdf
    • https://cdn.shopify.com/s/files/1/0437/9571/0113/files/xavikop.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/2020_calendar_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5461/files/mla_format_outline.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/line_dance_step_sheet_boot_scootin_boogie.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/ruwunavotinaxetugodaxenu.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_off0000a37b.bin
d6cc1f30af10cddca50c5d2a6305929a6d622f4e974e1342e04f46e79540a341		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA37B 5284 bytes
font_01_sfnt_off0000b566.bin
91d9b31fb6bdc1436aaf8bcba50e502be53dc41e82ce6668f2ac4a6e915328b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB566 13816 bytes
font_02_sfnt_off0000e173.bin
a15e981b9ad90e4f0e012197537e9f01de052b66bcd20ac2bcd9d448f170290b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE173 16512 bytes

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