Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb481b4a79a2644…

MALICIOUS

PDF

43.5 KB Created: 2020-08-16 16:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8679183a0eb050f8df0175599b499032 SHA-1: 80e06eb78de71fc60b3adda607d862dc6ae08d32 SHA-256: 1cb481b4a79a26447249e99dd5a0cf1989e4e729993b36f4ef4da2b15b43c1da
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic identifying a malicious redirector link. The document body, though heavily obfuscated, contains text related to a 'wedding couple dance video' and the malicious URL. This suggests a social engineering lure to redirect the user to malicious infrastructure. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the ultimate destination.

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=wedding+couple+dance+video
    • http://nenatas.neurobittech.com/uploads/1/3/1/4/131438216/5f378f108f42.pdf
    • http://kagul.webuyhousesingta.com/uploads/1/3/2/6/132681342/xifaporokutuxu_juzef_zusawom.pdf
    • http://files.wrmgllc.com/uploads/1/3/0/8/130874055/wogedeniwebe_wesafiviji_kemifuwijojo.pdf
    • http://files.merakiah.com/uploads/1/3/1/4/131482931/zanuru_pogagiwas_megugatevofuruf.pdf
    • http://files.spectra-music.com/uploads/1/3/0/7/130775892/rafiwarij.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/zibosaguwabefibolo.pdf
    • https://cdn.shopify.com/s/files/1/0437/8840/2839/files/lukivanewifiba.pdf
    • https://cdn.shopify.com/s/files/1/0433/6903/7974/files/14250658357.pdf
    • https://cdn.shopify.com/s/files/1/0435/1043/1896/files/pdf_converter_to_word_online_fast.pdf
    • https://cdn.shopify.com/s/files/1/0431/4028/4573/files/65363771084.pdf
    • https://cdn.shopify.com/s/files/1/0436/5982/1209/files/30223649505.pdf
    • https://cdn.shopify.com/s/files/1/0438/5194/0000/files/administracion_financiera_ii_ucr.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/kotewodofuviw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6550/8002/files/mawefakabawotetep.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_off00006c97.bin
37b9ffd015f0e9de63ec2cd2f87b96ea765a6f78968fdd05eab4fb6435d2663c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C97 5040 bytes
font_01_sfnt_off00007ddb.bin
1a680359d4bf1e45440c65aa98854d9c8d8da55e13a154704693944161941d24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDB 10412 bytes

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