Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b9a7f3a777a695…

MALICIOUS

PDF

47.8 KB Created: 2020-08-14 23:18:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab2a206ee1eb9a546c0cdfa8e82d50b1 SHA-1: 712dd6955007cf3d3acf375e5b93da52325804a4 SHA-256: f5b9a7f3a777a695e1bbfeef388abde7049f2fa4355940d215253e322a68290a
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL is likely intended to redirect the user to a phishing or malware distribution site.

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.com/pify?keyword=criteria+of+brain+death+pdf
    • http://files.fayrenaissance.co.uk/uploads/1/3/1/8/131857540/pelidivametoguv.pdf
    • http://files.daily-writing-prompt.com/uploads/1/3/1/4/131438260/xadusakokozez.pdf
    • http://jimasosi.scottpaethdrums.com/uploads/1/3/0/8/130874631/mifodisi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2642/2687/files/vosobavujixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3759/7607/files/84793075497.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93336639176.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/33259356164.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1012/files/32799308183.pdf
    • https://cdn.shopify.com/s/files/1/0430/9732/5732/files/rakikejojekax.pdf
    • https://cdn.shopify.com/s/files/1/0431/2409/7175/files/smok_alien_220w_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8304/6813/files/47341647105.pdf
    • https://cdn.shopify.com/s/files/1/0432/3033/1039/files/pdf_acrobat_pro_download_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ff7.bin
a5a1ad278b70f764959b56f80e60cfc62f2de4ec26a70d97b7ee38a73f2c30cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF7 4868 bytes
font_01_sfnt_off0000806d.bin
4ca37e9488073e11c56c5759c4c9f7ac524aef4f07dbe19b928b7d1166317465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x806D 10856 bytes
font_02_sfnt_off0000a485.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA485 4324 bytes

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