Malicious PDF — malware analysis report

Static analysis result for SHA-256 3494353df6a5ebac…

MALICIOUS

PDF

37.7 KB Created: 2020-08-14 10:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcec0a6375dfa5a090fa55bc36807a56 SHA-1: 4d25caf5bbef9c69167927ee7337428675aa1477 SHA-256: 3494353df6a5ebac56b13008cc6c33bb5791797473c58919b28318e69f285b07
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=acr+neo+3f+manual'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0435/3818/6392/files/brighton_rock_download.pdf'. The ML classifier also flagged this PDF with high confidence. The document body contains obfuscated text and the malicious URL, suggesting an attempt to disguise the malicious intent.

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=acr+neo+3f+manual
    • http://files.paromat.com/uploads/1/3/0/8/130874381/nesirewabag_tozotonunogaxuw_gumoperob.pdf
    • http://kinojem.archildrensbookpublishing.com/uploads/1/3/1/0/131069839/2978579.pdf
    • http://files.davidmichaeldesign.com/uploads/1/3/1/6/131636766/3ab714.pdf
    • https://cdn.shopify.com/s/files/1/0435/3818/6392/files/brighton_rock_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/level_order_traversal_binary_tree.pdf
    • https://cdn.shopify.com/s/files/1/0440/4586/1014/files/assets_and_liabilities_management.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/zixevu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.pdf
    • https://cdn.shopify.com/s/files/1/0440/2675/7270/files/zoposoguximikigi.pdf
    • https://cdn.shopify.com/s/files/1/0429/4544/6044/files/62613202567.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/how_to_delete_tumblr.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/xitimozusivaxexijedi.pdf
    • https://cdn.shopify.com/s/files/1/0440/4104/4118/files/the_lost_steps_alejo_carpentier.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/wasanaju.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_off00004b4d.bin
c10e6f45538b7df77928ab25863ea62e47273d0cd4f5518f180ac1f98a430fc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B4D 5000 bytes
font_01_sfnt_off00005c33.bin
8cecfdc3bfd98eb7472d61a2b1f85c5924c961799106745ef65d30b99c2fa64f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C33 14492 bytes

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