Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8145eaccb033d9…

MALICIOUS

PDF

33.8 KB Created: 2020-08-06 18:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b87a4dabdb9ef523169c5e9854ab53b9 SHA-1: 9c5aed4c5417b4d5e6a34fbaf2767e517f3c58bf SHA-256: ed8145eaccb033d9e9bb8366c6ad6228e82afdf96be96f668646b87f9f6d57e7
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body and embedded links suggest a link farm or redirection tactic, aiming to obscure the final malicious destination. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/pify?keyword=beyond+training+pdf
    • http://files.professionaleyetusc.com/uploads/1/3/1/0/131071041/pudasuxujoguwodoxi.pdf
    • http://files.wolfeboroinn.com/uploads/1/3/0/7/130739570/wofafegaroxogi_sojude_xalugiratugawim.pdf
    • http://files.wildchildfreeschool.org/uploads/1/3/1/6/131606965/rekufowesiketawe.pdf
    • http://files.whshuskymusic.com/uploads/1/3/0/8/130813921/b0ef60.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/179082928.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/ferudevujurebetemadosi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6416/4506/files/89376349398.pdf
    • https://cdn.shopify.com/s/files/1/0440/6394/8950/files/tezarowujipoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/8062680784.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zejakepujubuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/8882/8829/files/netflix_forensic_files.pdf
    • https://cdn.shopify.com/s/files/1/0430/3038/0698/files/belarigiwojigekesopuxatog.pdf
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/vifevonolekajotunulazu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4496/9367/files/buku_undang_undang_dasar_1945_amandemen.pdf
    • https://cdn.shopify.com/s/files/1/0436/0473/8206/files/5943199741.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_off000044e7.bin
1e8d0a12bc9bc1cac7e6571d03cd16a6a43985d470f437287734dfe19102ea22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44E7 5148 bytes
font_01_sfnt_off00005692.bin
312042a9d828dab09ea3a90a9f7f9fcb9265bd434f3f80ddf5c3afce1152bb9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5692 10672 bytes

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