Malicious PDF — malware analysis report

Static analysis result for SHA-256 535559c856245a3f…

MALICIOUS

PDF

43.0 KB Created: 2020-08-23 10:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96052943d00a0e2a5a44b9683c4b7e24 SHA-1: 7ea91b1189b5b2e1556b47e824f745f5df9e28be SHA-256: 535559c856245a3f61505e9a4ccc73919d0bc5eebef7b09c28b3365455095ef9
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains this URL and also references 'certificate of participation template word doc', indicating a lure. The PDF also contains a mass external PDF link farm, with the primary host being cdn.shopify.com. The primary malicious URL is reconstructed from the document body.

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.cc/pify?keyword=certificate+of+participation+template+word+doc
    • http://fadeza.radicalhealing.us/uploads/1/3/2/8/132814930/gubam.pdf
    • http://files.messianiclaw.com/uploads/1/3/2/8/132815015/826316.pdf
    • http://janowilas.patchesoftimephotography.com/uploads/1/3/1/3/131378850/takojuleza-zexud-gidebemonegil.pdf
    • https://cdn.shopi
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/42864883110.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/xesibidurikovejedemoje.pdf
    • https://cdn.shopify.com/s/files/1/0432/9301/6222/files/viriliralidivakuwepem.pdf
    • https://cdn.shopify.com/s/files/1/0437/1136/5272/files/classification_of_drugs_kd_tripathi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8852/files/mijasejatuparusetubevi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9776/6553/files/fopapigekuwijoxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2639/0946/files/relunomixe.pdf
    • https://cdn.shopify.com/s/files/1/0436/0614/7230/files/h100b_pulse_oximeter.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/celia_cruz_azucar.pdf
    • https://cdn.shopify.com/s/files/1/0435/6086/1845/files/44386874107.pdf
    • https://cdn.shopify.com/s/files/1/0434/6596/5718/files/51237669596.pdf
    • https://cdn.shopify.com/s/files/1/0431/9235/2932/files/63446775865.pdf
    • https://cdn.shopify.com/s/files/1/0431/4519/9767/files/53324920012.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_off00006b7c.bin
b46d11168a757ce5d024b8d7b4e69dead913c6fedb16cb5685dc70dea2932fa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7C 5120 bytes
font_01_sfnt_off00007cd9.bin
5276fdd1ac5b74896f024cbf2a1364556ce8a08fb079046ffc7d15c59a1bc6aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD9 9884 bytes

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