Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1da716e3f7b0da…

MALICIOUS

PDF

45.7 KB Created: 2020-08-30 09:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89c242269ab67d81c332af870e6c9c7c SHA-1: f638a809d5f8b6688495e388f7c2c26f83af8799 SHA-256: 4e1da716e3f7b0dabf4f7ff39f26f477dca25a6d47af567cf08de8eeb07df103
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.ru/wix?keyword=copart+buyer+fees+calculator+uk'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://cdn.shopify.com/s/files/1/0435/4513/3207/files/lexepilovirefaz.pdf' being the first identified. The document body, though heavily obfuscated, contains these URLs, suggesting a lure to external malicious 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.ru/wix?keyword=copart+buyer+fees+calculator+uk
    • https://cdn.shopify.com/s/files/1/0435/4513/3207/files/lexepilovirefaz.pdf
    • https://cdn.shopify.com/s/files/1/0445/3544/7711/files/all_of_me_chords_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0463/1196/4829/files/new_janice_griffith.pdf
    • https://cdn.shopify.com/s/files/1/0432/8770/7812/files/victorinox_swiss_army_cavalry_watch.pdf
    • https://cdn.shopify.com/s/files/1/0434/9798/0056/files/54781652693.pdf
    • https://static.usrfiles.com/ugd/902d29_9cd16a1f16b646078c09cda06abcf745.pdf
    • https://static.usrfiles.com/ugd/b8c837_514fcb85c753499db8ea586f9985d5a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_16f109af16784a0ba3310f4d05027548.pdf
    • https://cdn.shopify.com/s/files/1/0435/2973/2248/files/16051434016.pdf
    • https://cdn.shopify.com/s/files/1/0427/9002/7430/files/tuxulifudobo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5468/4565/files/70478964483.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_off00006820.bin
d6785003d037a99c35639611d14545648ffe23231cd15f36260b1a83b11d2bcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6820 5064 bytes
font_01_sfnt_off00007985.bin
5462040455cfedec42f9a9c58b6a9c7d4bb25ce22793b78fa0e563ad7d04631b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7985 10060 bytes
font_02_sfnt_off00009bf5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BF5 4324 bytes

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