Malicious PDF — malware analysis report

Static analysis result for SHA-256 5590f30e2f60b47a…

MALICIOUS

PDF

49.0 KB Created: 2020-08-15 06:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bca0697f492c83cae19f85487b34aa97 SHA-1: b272902b9d88e5e48cdb940af51f656176ba36fd SHA-256: 5590f30e2f60b47aeb9650dec1af2b270cf3cfb851a242308a5b2908a67e3ed0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The primary malicious URL, https://ttraff.cc/pify?keyword=sepsis+3+guidelines+2017, is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to medical guidelines, suggesting a lure to entice users to click the malicious link.

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/pify?keyword=sepsis+3+guidelines+2017
    • http://files.theglassstationstudio.com/uploads/1/3/1/3/131379054/a287c.pdf
    • http://files.markwatsonwilliams.com/uploads/1/3/2/6/132695629/zulikaj-dulil-maguxajasowafu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9400/7191/files/zoey_101_cotton_swabs.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/mixipenoribubige.pdf
    • https://cdn.shopify.com/s/files/1/0436/3101/8142/files/2016_jeep_grand_cherokee_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/online_editor_free_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/losimudegitidejudiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/3530/3831/files/belubufova.pdf
    • https://cdn.shopify.com/s/files/1/0448/0725/8269/files/extended_metaphor_example.pdf
    • https://cdn.shopify.com/s/files/1/0429/8365/3527/files/zajovile.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/3992/files/88415483514.pdf
    • https://cdn.shopify.com/s/files/1/0436/6126/3001/files/estimation_and_costing_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/6558/0437/files/boss_gt_1000_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076b6.bin
9b4dc85296b1dc14b3ea3e36fbbc37652bb7f12dfe2337b6fcf227eb3aa57278		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76B6 5496 bytes
font_01_sfnt_off00008981.bin
d3e64c897a54e23e870fc3958767853427107181d6feb4ba87e8ae7bafdad08d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8981 14444 bytes

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