Malicious PDF — malware analysis report

Static analysis result for SHA-256 20f7541d8aed5335…

MALICIOUS

PDF

55.1 KB Created: 2020-09-07 02:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1be52ea43c21a951fb1118faed105269 SHA-1: 17809770ed1a7995b60cd3cd65af897fff7d58c1 SHA-256: 20f7541d8aed5335b8badaa1f1966ebde7d0b686bced117eedb07e14e7453cc0
152 Risk Score

Malware Insights

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

The PDF contains a prominent link to 'ttraff.me', which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Batman full movie in tamil' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous other links to Shopify, while mostly benign, contributes to a link farm tactic. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/wix?keyword=batman+full+movie+in+tamil
    • https://cdn.shopify.com/s/files/1/0428/4294/7751/files/bactericera_cockerelli.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/75088610199.pdf
    • https://cdn.shopify.com/s/files/1/0432/9799/6960/files/certificado_medico_cdmx_2020.pdf
    • https://cdn.shopify.com/s/files/1/0461/9170/6263/files/bidaje.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/65669085103.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8362/files/22_hebrew_letters_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/mechanical_engineering_projects_download.pdf
    • https://cdn.shopify.com/s/files/1/0439/8075/1006/files/biblia_de_estudio_nelson_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2654/files/36398008831.pdf
    • https://static.usrfiles.com/ugd/d99ef3_e9481c923ccf4e318fe346a94483db59.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ae6d2a5e5e34f3da6fda562755ab7c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_6eb6c193ad904bc6abfbbe9ed62d48d8.pdf
    • https://static.usrfiles.com/ugd/46a5ae_f2611e70d4994deb9bcc8b3dc45dc73d.pdf
    • https://static.usrfiles.com/ugd/4d400c_769ae58caa4a4b60b87c2a366d4fec9a.pdf
    • https://static.usrfiles.com/ugd/32777b_19f1ba867ae047139ebffc5a5551632f.pdf
    • https://static.usrfiles.com/ugd/067ecb_96c2fb18647b4a6c8894ebe6d64873c7.pdf
    • https://static.usrfiles.com/ugd/c3548c_f31024099c0c49b3aff0e9251b6b292c.pdf
    • https://static.usrfiles.com/ugd/48bf55_19580c1ce76c45be92b6167afc0dbf4f.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000732b.bin
60f52d4bf6f9cfbbfb70b17052ed6ae8c6e03c34656fc2300b782768857d7e0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x732B 3824 bytes
font_01_sfnt_off000080aa.bin
fbb6d19c0e291adf53b62f4064c1b2497aed709647208645d67b4427fb7c197f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80AA 4748 bytes
font_02_sfnt_off000090cd.bin
bc17bb2f555f1cc37cf38a17a4663692302646467275801b6d9fd5b1fc65b550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90CD 11080 bytes
font_03_sfnt_off0000b663.bin
d94fa074b2e91e44db3150ca6dc46bc13dbf7225c20886c1fa6f3b7e7c1e96cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB663 16856 bytes

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