Malicious PDF — malware analysis report

Static analysis result for SHA-256 e205719e075dfc7d…

MALICIOUS

PDF

40.9 KB Created: 2020-08-31 04:00:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b7e9dca36eb99b5959d0ea86bedbd1b SHA-1: 77112d02cda36e6d8a8d5ba8179363536eb4a3bd SHA-256: e205719e075dfc7d29517b6f14bdf58703e48d335a1cfd86c349c1d4e5ab37be
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.cc/wix?keyword=wong%2527+s+essentials+of+pediatric+nurs, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to the same URL and benign-looking PDF files hosted on Shopify, 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=wong%2527+s+essentials+of+pediatric+nurs
    • https://cdn.shopify.com/s/files/1/0433/0265/0020/files/33516042613.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/40682761353.pdf
    • https://cdn.shopify.com/s/files/1/0434/6239/4021/files/competitive_exam_maths_questions_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0465/5008/9878/files/print_book_double_sided.pdf
    • https://cdn.shopify.com/s/files/1/0437/2293/2373/files/school_building_plan_section_elevation.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/25224227240.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3496/files/11281265386.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/fivevisapugelifafizo.pdf
    • https://cdn.shopify.com/s/files/1/0441/2129/2952/files/55745661564.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9959313526.pdf
    • https://cdn.shopify.com/s/files/1/0431/1878/8774/files/ballarat_health_services_annual_report_2018.pdf
    • https://cdn.shopify.com/s/files/1/0461/9993/1030/files/leonard_cohen_sheet_music_hallelujah.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/loan_approval_letter_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/6191/9390/files/nugatisep.pdf
    • https://cdn.shopify.com/s/files/1/0464/3323/9192/files/import_csv_file_into_excel_sheet.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_off000061e4.bin
81d01666c16bae415e6de4a21f367650a6ee65e261412c3884fc470af6128f28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E4 5372 bytes
font_01_sfnt_off0000744b.bin
61b757d7f213ba575cab249eef9fd909d2c62327f83f70602d017e5f3884adb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744B 10128 bytes

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