Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce22a4fc600e291…

MALICIOUS

PDF

38.3 KB Created: 2020-08-30 17:08:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bc34b22a955a71a9248128fe4e71f55 SHA-1: 10a56c59f5f704c03f6ccdca8dd44863eaa73096 SHA-256: bce22a4fc600e291ec6947736b7cd441c9f3b38bcf88f77b165eaafaab0d376d
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=mantenimiento+correctivo+a+motores+e'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous links, with the primary one leading to a Shopify domain. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'Mantenimiento correctivo a motores e', suggesting a lure to a malicious site.

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=mantenimiento+correctivo+a+motores+e
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/zotofibozukudemizem.pdf
    • https://cdn.shopify.com/s/files/1/0434/7504/2457/files/lowuledigexudaka.pdf
    • https://cdn.shopify.com/s/files/1/0437/2060/5846/files/wordly_wise_book_7_answer.pdf
    • https://cdn.shopify.com/s/files/1/0437/8315/9969/files/65336568570.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/america_s_army_2._8._5.pdf
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/basic_english_grammar_third_edition_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/4853/4167/files/25170983304.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rafudegilezenetizaxesuvos.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5125/files/53842601404.pdf
    • https://cdn.shopify.com/s/files/1/0457/6087/2604/files/30129660796.pdf
    • https://cdn.shopify.com/s/files/1/0464/2511/2728/files/third_conditional_speaking_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/5258/7415/files/53422614267.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_off00005944.bin
40828137afb67681a190118022f9c7a8b8a6940c536a53e5ea1061922c79ce58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5944 4980 bytes
font_01_sfnt_off00006a24.bin
9f0742f5de38faa418b6486c3f5a02f53a591e22fb1f4e6bf6d0cb5492a7ffcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A24 10508 bytes

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