Malicious PDF — malware analysis report

Static analysis result for SHA-256 51fbbfa6aaca0aa0…

MALICIOUS

PDF

38.1 KB Created: 2020-08-31 13:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6410b371f64c742aabe81a89249dffc SHA-1: 534492af9080523a23944141e8ba405e472a542a SHA-256: 51fbbfa6aaca0aa06fd13fc02861878f497d228bbfe06d4a8c69ac1fa0dfeddc
150 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.cc' which is flagged as a malicious redirector. The document body, though partially corrupted, includes the text 'Cannot manage active directory certificate services' and the malicious URL, suggesting a social engineering lure. The presence of a large number of external links, including the malicious one, indicates a link farm strategy to distribute malicious content.

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/wix?keyword=cannot+manage+active+directory+certificate+services
    • https://static.usrfiles.com/ugd/b8c837_7f4329fbca514f19b89026caab24482f.pdf
    • https://static.usrfiles.com/ugd/dd4472_407cc51a1d8241ae951316bc58ef233a.pdf
    • https://static.usrfiles.com/ugd/39cb9d_9c300b329d1e45039f6a10c95c28614e.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0759/files/74738928614.pdf
    • https://cdn.shopify.com/s/files/1/0435/0273/1430/files/duvedoxaxowu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8067/9577/files/4k_camera_filmmaker_pro_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1353/6925/files/nibidokodifagemanigono.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/31967950149.pdf
    • https://cdn.shopify.com/s/files/1/0438/0947/2669/files/arthur_schopenhauer_on_the_suffering_of_the_world.pdf
    • https://static.usrfiles.com/ugd/ce5d00_baba6dc11b45498db02c9be7741fe6d1.pdf
    • https://static.usrfiles.com/ugd/822ecd_f62b1eeeeb1e45249bf048bf2b6efc44.pdf
    • https://static.usrfiles.com/ugd/b8c837_d92458ecee1c45c6b35af5bffbd129bb.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_off00005681.bin
a7051afa2ff3ae2fb4ad483302b247ebda550319a3680bd2155e0b9feaadf5c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5681 5376 bytes
font_01_sfnt_off000068c2.bin
c918d5d2bc631c5fde87a49562ac580ecc60dfb9bc248393e73950cab7ef964f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C2 10128 bytes

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