Malicious PDF — malware analysis report

Static analysis result for SHA-256 b007214a73a4d15b…

MALICIOUS

PDF

40.0 KB Created: 2020-08-23 00:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9e87841355e9241942cd88acf68b655 SHA-1: 6147d8816a63d7784ae898e1563f3b45192a2ee4 SHA-256: b007214a73a4d15b572665e6f2339273039a39145043e83640f468475ad97177
92 Risk Score

Malware Insights

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

This PDF document contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, includes the URL 'https://ttraff.cc/pify?keyword=vasovagal+syncope+patient+information', which is likely intended to redirect the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern observed is social engineering, using a lure of 'Vasovagal syncope patient information' to entice clicks on 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=vasovagal+syncope+patient+information
    • http://files.outandplay.com/uploads/1/3/1/6/131607093/xubumumedamotexigulo.pdf
    • http://files.dawnhomesut.com/uploads/1/3/1/6/131637876/nifak_toluvenizif.pdf
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/jiresitov.pdf
    • https://cdn.shopify.com/s/files/1/0434/4138/9720/files/bee_swarm_simulator_hack.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/5258380374.pdf
    • https://cdn.shopify.com/s/files/1/0431/9245/1232/files/fimajerilanugeragirumom.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/91711745570.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/angielski_w_tumaczeniach_gramatyka_4.pdf
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/66644132125.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_off00005f83.bin
baee56c4e97cea71666476f6ace0b69800a2a057cf620654212e9248c5cfd9b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F83 5460 bytes
font_01_sfnt_off00007213.bin
953193ea58b13bfa08d2b3eae7900871c63c65c3a3b1cea1af1e9542c2802470		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7213 9736 bytes

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