Malicious PDF — malware analysis report

Static analysis result for SHA-256 c83a6e1ceed94f20…

MALICIOUS

PDF

44.4 KB Created: 2020-09-16 22:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00d32096ef3588d0855174903de2b482 SHA-1: 70d27a43c1005302c7108a6ea40acc91e0ebffa7 SHA-256: c83a6e1ceed94f20e911bbd9b02ef307e20811d38a340de092bf22e58365d4ec
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=combat+shooting+games+unblocked', which is also listed as a malicious redirector. This suggests the primary purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

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/wix?keyword=combat+shooting+games+unblocked
    • http://files.iowaiova.com/uploads/1/3/1/6/131608037/pipasinezexeledola.pdf
    • http://gazitoxek.richfeenstra.com/uploads/1/3/1/4/131454215/soxewedulu_xunoromurato.pdf
    • http://sejitubo.hlmanagement.org/uploads/1/3/1/4/131453119/4224300.pdf
    • http://sumirogo.bunburyanglican.org/uploads/1/3/0/7/130776208/mabum.pdf
    • http://files.pitch2script.com/uploads/1/3/1/6/131607712/bipebemowipo.pdf
    • http://napajomib.jamietayloronline.org/uploads/1/3/2/3/132302966/selasozavuzin.pdf
    • http://files.christopherlauto.com/uploads/1/3/2/7/132740413/tesenidukisipe_tifiwosenu_fixelakemak.pdf
    • http://files.queenslandinsulation.com/uploads/1/3/0/7/130738548/f63953.pdf
    • https://7d351604-0b19-4004-a954-a44be34e36f3.filesusr.com/ugd/3be48b_a11df265f439469491f13d14dde55173.pdf?index=true
    • https://08a68d73-4b36-4148-b6b8-673685bbdb40.filesusr.com/ugd/1da05d_54065cc51503400ab0d38a6c457e3dbe.pdf?index=true
    • https://5b8d16fe-1c5e-4301-b038-4782c0e23369.filesusr.com/ugd/162fe6_0046cffc4efd457e98f742e5a779210e.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0449/7843/8302/files/vrealize_automation_7_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/jasisodelareruzawus.pdf
    • https://cdn.shopify.com/s/files/1/0432/5752/8478/files/92473320485.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_off0000701c.bin
3c0d9b289516fb9019e6105a1ee435a6e6fff66598bef99aee7789fcd99009bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701C 5364 bytes
font_01_sfnt_off0000822c.bin
b0493204f3118799b49960786c8bd57577fe855641f694c0d5fe4615398ed45b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x822C 9992 bytes

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