Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc554e83a6b08f1f…

MALICIOUS

PDF

46.0 KB Created: 2020-09-01 19:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8131ae94d1e488d43511691c83a136be SHA-1: 265950753d15f60abe262ef8d189194c50893bb7 SHA-256: cc554e83a6b08f1fcb36d393cf01464ab60b2be97f7d1e37de8b51920815a831
120 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, which in turn uses keywords like 'pubg mobile cheats android' to entice clicks. The document body, though heavily obfuscated, contains a reference to the same malicious URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to improve SEO for malicious content.

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/wix?keyword=pubg+mobile+cheats+android
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/save_audio_from_youtube.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/analogy_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/5656/9249/files/57446234248.pdf
    • https://cdn.shopify.com/s/files/1/0428/6231/3631/files/meredonekegupek.pdf
    • https://static.usrfiles.com/ugd/895bef_73fdb6fcad25497f930723d82a8f7cd6.pdf
    • https://static.usrfiles.com/ugd/c3548c_c1a4e48871974e12bc12f567ec35349a.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3370/files/angry_birds_the_movie_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0433/2231/0811/files/jopawizuzowadaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9933/2516/files/identification_authentication_and_authorization.pdf
    • https://cdn.shopify.com/s/files/1/0440/9825/7048/files/citing_an_online_dictionary_apa_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0293/files/kitogibivapulepuwimifeki.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_off000074ec.bin
1886b2eb59ce23a71a35a73190842f3f5494343792c6dcd4d6c4ea72917b264b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74EC 5496 bytes
font_01_sfnt_off00008769.bin
f4c539fbd699edc2e5d604f6a1df95eee7b95757eb2faf05f24e903f8b408864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8769 10868 bytes

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