Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52616481e5f6a0e…

MALICIOUS

PDF

62.3 KB Created: 2020-09-16 05:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01fd54858f65b24d7ff91384bb4a6177 SHA-1: e79d51a2782e994b2f1f40ac5177c15422e3b71b SHA-256: a52616481e5f6a0e7f411f275593f708465ccd8bfcdfe3c495d8420f4a21c5dd
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=slippery%20jack%20mushroom%20look%20alikes'. Additionally, another critical heuristic indicates a PDF link farm, with numerous external PDF links. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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.cc/wb?keyword=slippery%20jack%20mushroom%20look%20alikes
    • http://files.shimritlee.com/uploads/1/3/0/9/130969545/f3c404dd026ef0.pdf
    • http://files.simplyburtons.com/uploads/1/3/1/1/131164027/wazunibuzunepe.pdf
    • http://muxok.calgaryboxingclub.net/uploads/1/3/1/3/131380213/241130cb7cc770.pdf
    • http://files.mkhventuresdb.com/uploads/1/3/0/8/130813364/173f724d.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_aa641bca4a6d454d93890b3c3ff95a12.pdf
    • https://cdn.shopify.com/s/files/1/0437/2889/6161/files/cloudformation_template_ec2_instance_example.pdf
    • https://cdn.shopify.com/s/files/1/0439/0069/8792/files/particle_clicker_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0430/6472/1562/files/despacito_two_violin_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/4711/6185/files/36753504750.pdf
    • https://cdn.shopify.com/s/files/1/0431/1898/5370/files/fulasasavosidotaxuvisi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80170273674.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_off0000b5be.bin
3a79ab85ed3f6ae8b5c30dc19d052f9b5da4dd1e2171884b04d2defb9d38d5dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5BE 5516 bytes
font_01_sfnt_off0000c85f.bin
4aa39bf4be108b3c43254bd82453073f9b914fb947a312d0b593aa4766a7fe84		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC85F 10472 bytes

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