Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ec053db435ab8be…

MALICIOUS

PDF

39.9 KB Created: 2020-08-26 19:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61f093e0bf91d0b9136078597501b024 SHA-1: 1cbb7fc9c87057c752e8fb4cb221e96e7820c6eb SHA-256: 2ec053db435ab8be7a580d546a096c18aba7102cea33717cff3408fab498a1ee
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic firings indicate that this is a PDF link farm, likely designed to manipulate search engine results or redirect users to malicious content. The primary malicious IOC is the redirector URL.

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=basketball+court+diagram+with+labels
    • http://files.privatetours-shanghai.com/uploads/1/3/0/8/130813837/widifesaw_kaditebogapure_jobakesexomokur_posozofuxarofi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7217/5781/files/performance_review_questions_and_answers_for_employees.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/a_dozen_a_day_piano_book_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9472/1187/files/nolubigibuzisov.pdf
    • https://cdn.shopify.com/s/files/1/0435/6256/5795/files/6362944484.pdf
    • https://cdn.shopify.com/s/files/1/0430/0403/5221/files/medical_english_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/3521/3479/files/kagetinikegawawop.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/totamabagerefataxifol.pdf
    • https://cdn.shopify.com/s/files/1/0440/1784/4382/files/50225009068.pdf
    • https://cdn.shopify.com/s/files/1/0428/8865/9100/files/cidos_orgnicos_e_inorgnicos.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_off00005d47.bin
21b6a0cb7131a3f82f7a506476cddacb8046675dfe12f0625e02fc2a152cf3cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D47 5700 bytes
font_01_sfnt_off0000708f.bin
b4b87e5e95083bd77dfbbc45917a3f90765125eb908646d6b90afd22e76cda12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708F 10060 bytes

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