Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c38c616cbee3f94…

MALICIOUS

PDF

45.2 KB Created: 2020-08-31 11:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72d01e8ee4b411024210c02daf2fe17a SHA-1: 2a6f89362571b077f6aab04ebd2780badc1069d6 SHA-256: 2c38c616cbee3f94a41593657de4f683c76f81b284746d7d7097e08364095120
120 Risk Score

Malware Insights

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

The PDF contains a prominent link that masquerades as a 'bonafide certificate form' and directs users to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL and appears to be generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of numerous other Shopify links suggests a link farm tactic to obscure the malicious destination. The primary attack vector is likely social engineering via a deceptive link within the document.

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/wix?keyword=bonafide+certificate+form+rajasthan+status
    • https://cdn.shopify.com/s/files/1/0434/1583/0695/files/2nd_conditional_game.pdf
    • https://cdn.shopify.com/s/files/1/0428/9924/3174/files/vertex_form_equation_of_a_parabola_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/runescape_rune_ethereal_fragments.pdf
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/48676154512.pdf
    • https://cdn.shopify.com/s/files/1/0433/9263/0940/files/vituroruguporonilu.pdf
    • https://static.usrfiles.com/ugd/fb5067_0052e38dc957465aa956d3abfc27d2bd.pdf
    • https://cdn.shopify.com/s/files/1/0437/7716/3416/files/minor.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/pizufeweradanetujevefo.pdf
    • https://cdn.shopify.com/s/files/1/0463/1022/8128/files/monster_hunter_world_cooking.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/romoloxerokimukunurotufeg.pdf
    • https://cdn.shopify.com/s/files/1/0438/6678/3904/files/dictionnaire_anglais_franais.pdf
    • https://cdn.shopify.com/s/files/1/0430/0436/2906/files/netine.pdf
    • https://cdn.shopify.com/s/files/1/0433/3551/6318/files/63230550359.pdf
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/wumijelep.pdf
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/fazijedezofemisudibonowex.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_off00006424.bin
a973e3c26dcf2b01efccae3e78d07fe982b87f089737c03fc047e55d7f7c368a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6424 5352 bytes
font_01_sfnt_off00007630.bin
0517df96eb394d155174f729b1f9de53225b8d6dbad0a849f66f682502765372		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7630 15452 bytes

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