Malicious PDF — malware analysis report

Static analysis result for SHA-256 59de71b3b35d5005…

MALICIOUS

PDF

39.9 KB Created: 2020-08-18 22:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd7154278aa53e692cda780126f7ec64 SHA-1: fe8f6b8a01d4248b62f99b802117bfa97f75a76c SHA-256: 59de71b3b35d5005b84e70e06be7364f0ce9455a5fb7cb1c11ad785f741cf2ac
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised with keywords related to 'Battlefield 5 gameplay pc'. This is further supported by heuristics indicating a malicious redirector and a link farm, suggesting an attempt to drive traffic to malicious sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=battlefield+5+gameplay+pc
    • http://files.jilledelsteinlcsw.com/uploads/1/3/0/7/130738741/cd833b04e0.pdf
    • http://dobuxipak.ifindoubttravel.com/uploads/1/3/0/9/130969723/5230393.pdf
    • https://cdn.shopify.com/s/files/1/0434/1750/1852/files/amenaza_de_aborto_tratamiento_farmacologico.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3781/0075/files/xejeruwagefol.pdf
    • https://cdn.shopify.com/s/files/1/0436/7548/4313/files/jotenugikufudikepus.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6546/files/card_flip_animation_android_github.pdf
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/fishing_report_on_leech_lake_mn.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/31800333647.pdf
    • https://cdn.shopify.com/s/files/1/0433/3459/8809/files/vertex_form_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/49159743023.pdf
    • https://cdn.shopify.com/s/files/1/0431/7328/1948/files/44271397893.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/xasinudezinavikoxumogiwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/7063/6710/files/frightful_s_mountain.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_off00005ce5.bin
da65ac621d28162301932ee32473a355e89524949dadff3d1dab0bd699c21b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE5 5476 bytes
font_01_sfnt_off00006f82.bin
fff6b86d7457ffce9494aed19512edfcfe4e457c9a346ce59e22f9d056008c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F82 10468 bytes

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