Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c680b90eb77c6c1…

MALICIOUS

PDF

98.0 KB Created: 2020-08-11 18:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b22a3dce07eccbc9187308a031f79a80 SHA-1: 510282733024e5bc0eb2b7980e78970d744ce24f SHA-256: 4c680b90eb77c6c1b8a311362c37bc32f81789ef61b16b8ee86fa9184d5b4a73
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, a PDF link farm heuristic suggests the document is part of a larger SEO manipulation scheme to distribute malicious files. The ML classifier strongly supports the malicious verdict.

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.cc/pify?keyword=agrobacterium+mediated+plant+transformation+pdf
    • http://jifepenu.drandreasmarx.com/uploads/1/3/2/3/132303382/jilepav-rudagekof.pdf
    • http://files.sagemoonshop.com/uploads/1/3/1/4/131437878/rosanovozar_pemem.pdf
    • http://ruvir.mitemplosagrado.com/uploads/1/3/1/4/131407995/xizadilu_xunipeguvusev_ralixa.pdf
    • http://files.catherinetrinkle.net/uploads/1/3/0/8/130813866/1237880.pdf
    • https://cdn.shopify.com/s/files/1/0432/0346/1283/files/87467574962.pdf
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/dobobizizino.pdf
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/tosazapukogobodazokeg.pdf
    • https://cdn.shopify.com/s/files/1/0428/9930/8700/files/bohemian_rhapsody_guitar_tabs.pdf
    • https://cdn.shopify.com/s/files/1/0431/8658/5759/files/21715647232.pdf
    • https://cdn.shopify.com/s/files/1/0435/5060/5461/files/kinuxetofexow.pdf
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/disable_android_auto.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/lobegijemaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/64720776348.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7779/files/college_accounting_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/dewajiguvilegamizivadul.pdf
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/vimigugupurideromesogo.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_off000140a5.bin
d5265744498c1f015b44ddc4c7291beb84e92cd599a3efb2beb58a55c2b40025		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140A5 5604 bytes
font_01_sfnt_off00015393.bin
e56eb8b35e4e83fecfacc2acdf84d18dbeb04df364cf5d1570de17303e8610cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15393 11852 bytes

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