Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e5e7c9d74bbbd3…

MALICIOUS

PDF

43.1 KB Created: 2020-08-22 09:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63fd23a5263c3f0242f09f45114b3285 SHA-1: f0d6c9577e31ce5a8436691404e4a0d9693161c4 SHA-256: 53e5e7c9d74bbbd386e3c0872fb2acc33ffb8d86c1d172c00022214a7859f636
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=formal+letter+to+a+couple', which is designed to redirect users to potentially harmful content. Another heuristic indicates a large number of external PDF links, suggesting a link farm or SEO poisoning attempt, with 'https://cdn.shopify.com/s/files/1/0430/0364/2007/files/wawutas.pdf' being one of the first identified. The document body contains garbled text but includes the malicious URL, reinforcing its role as a lure.

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/pify?keyword=formal+letter+to+a+couple
    • http://files.ciprianoclassic.com/uploads/1/3/0/7/130775023/fufawugejijaxofa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/wawutas.pdf
    • https://cdn.shopify.com/s/files/1/0440/1440/3742/files/2061872954.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/51189386949.pdf
    • https://cdn.shopify.com/s/files/1/0435/1790/3003/files/66697206238.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/72819622732.pdf
    • https://cdn.shopify.com/s/files/1/0431/9179/5875/files/reverse_an_integer_java.pdf
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/netaradadimonubadefixu.pdf
    • https://cdn.shopify.com/s/files/1/0427/9874/3719/files/the_oxford_handbook_of_functional_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/kiwafudebitifovobapug.pdf
    • https://cdn.shopify.com/s/files/1/0437/0019/1387/files/telugu_devotional_books_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060be.bin
84b32dc75dc2fb8c7e566c2cb4da99dad6abbbdf286a71b405652ee22a14ba7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60BE 4584 bytes
font_01_sfnt_off00007050.bin
92a7d633d1eec780d1c7f2c3f85220f75fabc5cf3b2896a14eb718998229930f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7050 9840 bytes
font_02_sfnt_off000091fd.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91FD 4324 bytes

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