Malicious PDF — malware analysis report

Static analysis result for SHA-256 211f1cbdf757e726…

MALICIOUS

PDF

43.1 KB Created: 2020-08-22 17:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ef581f248678bb0cedd3b68eaa7dd7 SHA-1: 0fa3bc12189269abc0684406cf88c17ab1511a56 SHA-256: 211f1cbdf757e726a2f851e5e92b933bea49b6b16fa452d6da91ff7238bc4d85
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised with a lure for a game hack. This link points to 'ttraff.cc', a known malicious redirector. The document also functions as a link farm, with numerous embedded links to other PDFs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a deceptive link.

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=angry+birds+transformers+hack+android+1
    • http://binetuso.middleschoollegion.org/uploads/1/3/0/7/130776330/0468368b70ec5.pdf
    • http://files.jamielanesweets.com/uploads/1/3/1/8/131872055/218054294d54.pdf
    • https://cdn.shopify.com/s/files/1/0438/9414/5176/files/weather_report_chehalis_wa.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/apple_inc_company_profile.pdf
    • https://cdn.shopify.com/s/files/1/0435/4880/3227/files/cazadores_de_microbios_paul_de_kruif_descargar.pdf
    • https://cdn.shopify.com/s/files/1/0438/9208/0795/files/21392538823.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0954/files/gazigopozu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8357/0083/files/13174515723.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kefemomorevogik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6001/0912/files/36442503850.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4965/files/equivalent_fractions_worksheet_year_4.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_off000068ce.bin
2d944388c2885fbdd83ac9ea9ee44497a6c5be14a6c4c1614e74b68117d7ac89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68CE 5748 bytes
font_01_sfnt_off00007c3e.bin
9146be9d590881ea82d5273b32700fcbd2b264f5bae18112968ce9bf370ea030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C3E 10496 bytes

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