Malicious PDF — malware analysis report

Static analysis result for SHA-256 b44ec95f50765432…

MALICIOUS

PDF

52.9 KB Created: 2020-09-01 05:27:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84e7d24725a9127f1f0aa9f9ae9f977f SHA-1: ec68080b5de8c2b6c5f7b998134f5d76ed87b8b0 SHA-256: b44ec95f50765432c28af94ff98c6bc4bf4311fb21624aa6579e5b13768b610a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com and static.usrfiles.com. One critical heuristic firing indicates a malicious redirector link to 'ttraff.club'. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect the user to this malicious site. No scripts were extracted from this sample.

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.club/wix?keyword=epithelial+tissue+histology+answer+key
    • https://static.usrfiles.com/ugd/83b1b3_3d0020e0d49b41e0b2f52a7ea14dd4bf.pdf
    • https://static.usrfiles.com/ugd/4117a9_f4a92a2f5bd943729616bb90e01a34c8.pdf
    • https://static.usrfiles.com/ugd/e4a001_2a91c791efbd4dcbb32f43dfd72eb41a.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bisadugizutojaririxenudep.pdf
    • https://cdn.shopify.com/s/files/1/0434/6678/4932/files/best_android_casual_games_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/2629/0587/files/mohsen_ebrahimzadeh_bardasht_raft.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/68622197360.pdf
    • https://static.usrfiles.com/ugd/a298ce_2128570c06684892a4aaeaafe3a20c08.pdf
    • https://static.usrfiles.com/ugd/19103d_12290bf4b61a4a2da26a195273c0150b.pdf
    • https://static.usrfiles.com/ugd/3cb679_bacd3591ae874acab9f78fa04f4d294c.pdf
    • https://cdn.shopify.com/s/files/1/0433/8886/2614/files/nekukekuri.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/geduzibuzazogufikuz.pdf
    • https://cdn.shopify.com/s/files/1/0462/6451/6757/files/virginia_beach_uncontested_divorce_manual.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_off00008451.bin
16f23012caa89c81492e1f4bb69630283f116e0fd35d14d3e7f492f674aa00bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8451 5176 bytes
font_01_sfnt_off000095ff.bin
0e9b27e8f92dd3702b5dbff75c0c3bc1d1a650bb0fb804b5958a380fe78c2ad9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95FF 10028 bytes
font_02_sfnt_off0000b83a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB83A 4324 bytes

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