Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca1bdfae62ce924a…

MALICIOUS

PDF

47.0 KB Created: 2020-08-23 17:39:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b30912a3a9038c9ae4d9868621d65a1 SHA-1: d4e315b7b9b5156ce3996b8e3c4ef4acc6ba2895 SHA-256: ca1bdfae62ce924aea1ff530c5c041d11d6aa657fd128278726a5b7d55b15805
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that aligns with this finding. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, further supporting the malicious intent of redirecting users. The primary malicious URL identified is https://ttraff.com/pify?keyword=distrust+game+guide.

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.com/pify?keyword=distrust+game+guide
    • http://xutenoz.mistressakella.com/uploads/1/3/1/4/131406982/45c9b875.pdf
    • http://files.moment-of-clarity.org/uploads/1/3/0/9/130969452/wugopuzagiguko-jerakajupu-ganudurob-wisigaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/5241/6672/files/bl2_storm_front.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22700630349.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7560/files/kibegajerivi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0530/3205/files/tokor.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4719/files/81295657418.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/49346741544.pdf
    • https://cdn.shopify.com/s/files/1/0432/3013/4427/files/jiduzigafivigofunakoxemut.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/twinkle_twinkle_little_star_variations_piano.pdf
    • https://cdn.shopify.com/s/files/1/0433/7693/5068/files/100_aviones_de_papel.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_off000079c7.bin
b7ef74a4415060d9cdc7f0036f486b19eb1294dfe451543cdd96ffdd08ae8fbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79C7 5112 bytes
font_01_sfnt_off00008b0e.bin
2842df319dbe1d4a8b0d4dc7a5f624c0d72bee33183aed0e9956a757dee2a24d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0E 10308 bytes

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