Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd78cde2ba5fe93…

MALICIOUS

PDF

43.4 KB Created: 2020-08-30 23:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49d1a08b4c6cd6ed289fb3a8c64301ed SHA-1: c18db00b5a86f6adde50225e6f15cb2fab98efa3 SHA-256: 2cd78cde2ba5fe934e424c861662eae0a394ffc119048706ec435c40810ed5c6
120 Risk Score

Malware Insights

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

The PDF contains a link farm of external PDFs, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL. This suggests the document is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. The presence of multiple Shopify URLs indicates a potential attempt to blend malicious links with seemingly benign content.

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=two+dots+tips
    • https://cdn.shopify.com/s/files/1/0465/0598/4158/files/50487507577.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/anemia_de_clulas_falciformes_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/pefavalajagegud.pdf
    • https://cdn.shopify.com/s/files/1/0438/1193/0274/files/8719244285.pdf
    • https://cdn.shopify.com/s/files/1/0437/6982/3383/files/systematic_error_and_random_error.pdf
    • https://static.usrfiles.com/ugd/b8c837_54aff90327a942fe8d998f90f4cc31ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_e28ad10048174f96ad44a077dbc55c73.pdf
    • https://static.usrfiles.com/ugd/8acad3_490b8b5af0e44010b0a82d9632f627ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_3eecc460d65b40b39c20558ba37dc838.pdf
    • https://static.usrfiles.com/ugd/ddb60a_bd245362c62d4ff486495fe9c6768316.pdf
    • https://cdn.shopify.com/s/files/1/0432/0729/5140/files/apprendre_le_franais_en.pdf
    • https://cdn.shopify.com/s/files/1/0428/9983/2995/files/dashboard_template_using_angularjs.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/79800635297.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_off00006f0c.bin
48644187768b8ee89954f73fc828e7b19c856762c84c81dac8709f42341d713d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0C 4656 bytes
font_01_sfnt_off00007f0b.bin
be8e4ccc5be8f9a2860d4ab61f978de028fb27daf30ee40e007fa2c2dbc791bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F0B 9872 bytes

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