Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32aefcad719d9cc…

MALICIOUS

PDF

45.9 KB Created: 2020-09-06 17:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8a6a0a36487d1756519365484655d0e SHA-1: 4c3a70ceafb423d2f09cfd045738c8fe7764e15f SHA-256: e32aefcad719d9cc19c2f323044e900d1f7df445468e265ef2d1a57de463d909
162 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/wix?keyword=text+animation+maker+apk'. It also exhibits characteristics of a PDF link farm, with numerous links to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the same malicious URL and a benign-looking PDF filename, suggesting a lure to disguise the malicious intent. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document may be intended to trick the user into providing a password for an archive, a common tactic to bypass initial security scans.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=text+animation+maker+apk
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/electronic_devices_and_circuits_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9010/files/koboviritejofosedunafalo.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2158/files/wilikofufazemos.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/10938935909.pdf
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/sucesion_ab_intestato_derecho_romano.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6257/files/viripolirizipobadetiroki.pdf
    • https://cdn.shopify.com/s/files/1/0448/3586/4736/files/winrar_file_password_recovery_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0018/4477/files/rumadekujosigetewit.pdf
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/fipad.pdf
    • https://cdn.shopify.com/s/files/1/0433/2604/6362/files/basics_of_share_market_trading.pdf
    • https://cdn.shopify.com/s/files/1/0432/7515/7670/files/siwovarudedijufimanomaju.pdf
    • https://cdn.shopify.com/s/files/1/0439/3297/5272/files/bootstrap-_dropdown_hover._min._css.pdf
    • https://static.usrfiles.com/ugd/0511f5_d4f9452173494460b81a2f92748e35e1.pdf
    • https://static.usrfiles.com/ugd/9b33c5_4fa621d4cbfb484584565f82c8f53fdd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006260.bin
29272bc80b4f2fde06e4056900a9c6dbba58e72b4a44fcacdbbe032beb66daad
pdf-font-stream PDF embedded font (sfnt) at offset 0x6260 4836 bytes
font_01_sfnt_off000072c2.bin
98b69a164cfcd02850b759d2c6ff52b13a3c2f933fce1f96279e2c18c0ab604a
pdf-font-stream PDF embedded font (sfnt) at offset 0x72C2 10128 bytes
font_02_sfnt_off000095b7.bin
4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06
pdf-font-stream PDF embedded font (sfnt) at offset 0x95B7 16164 bytes