Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3ddea0a122773f…

MALICIOUS

PDF

40.0 KB Created: 2020-09-10 17:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75dc17bcdde43f7268ffcad790ee866d SHA-1: 6a2738a843060bcefdac715e8df6c21f3231b452 SHA-256: 9e3ddea0a122773f6fc40bc0c879c5d8369ead54dbf0d973263e85e17a230fb7
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, identified as a link farm. One of these links, 'https://ttraff.club/wix?keyword=collegedunia+app+apk', is flagged as malicious and likely serves as a redirector to a malicious site. The presence of numerous links, many pointing to external PDFs, suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign documents.

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.club/wix?keyword=collegedunia+app+apk
    • https://cdn.shopify.com/s/files/1/0430/1848/5923/files/54487640100.pdf
    • https://cdn.shopify.com/s/files/1/0462/4452/8288/files/jumbled_sentences_for_class_7_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9745/files/pdf_page_splitter_software_free.pdf
    • https://static.usrfiles.com/ugd/eddc50_3f28e63b485743139f06250fcf938174.pdf
    • https://static.usrfiles.com/ugd/63d3ad_a5f6f7237d8d4921b9e44e9631d582bd.pdf
    • https://static.usrfiles.com/ugd/72216b_0d08199e7cf945e2bc4e548d7ded19b0.pdf
    • https://static.usrfiles.com/ugd/e02969_16f9d79e39ff4b24b3e89c3020207f18.pdf
    • https://static.usrfiles.com/ugd/451461_f8826932131e45398cd4f077404d0ca1.pdf
    • https://static.usrfiles.com/ugd/79e0dc_b8e60e7aae2b4e4ab8efe2c9271acfad.pdf
    • https://static.usrfiles.com/ugd/aaaf79_3cd07d5ae5bb47c2aa7c8ba5e9d36046.pdf
    • https://static.usrfiles.com/ugd/2d1648_8dab396f1c7c4afb9ecf41b50c3d329a.pdf
    • https://static.usrfiles.com/ugd/9ea9b6_549418ba225c4b4fa51f18a8cbfdcd5a.pdf
    • https://static.usrfiles.com/ugd/8e9e2f_b76a82e2b54a41afb796654f01b141ed.pdf
    • https://static.usrfiles.com/ugd/d54300_bbafd14be6564d59834adfdd6ff48282.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_off0000604c.bin
32c699b1f5f3e0c95674b738d6fe8ff664bafa7bb88b3a6401b5261db0bd57b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x604C 4820 bytes
font_01_sfnt_off000070c7.bin
a8eb6be55cb485c36e06b23d2b676d3194bcb24ee29e48e742b29b8609ec9aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C7 10120 bytes

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