Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78517ae6c971f13…

MALICIOUS

PDF

49.5 KB Created: 2020-09-09 06:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d958e4303814d593efda6e376f520e7 SHA-1: 479610cf0c9dc01cc75fdc74f372a227fba002b2 SHA-256: d78517ae6c971f1357afca8f7b089042a317693bdec6b1f7993816b7747be2a9
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.club, which is likely used to deliver a payload. The document body and embedded URLs suggest a lure related to 'teatv apk iphone', aiming to trick users into visiting the malicious site. The presence of numerous other PDF links further indicates a link farm used for SEO poisoning or traffic redirection.

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.club/wix?keyword=teatv+apk++iphone
    • https://static.usrfiles.com/ugd/98d33d_75bf0e1eac6248728eb5675dd73b4c02.pdf
    • https://static.usrfiles.com/ugd/963627_36378faa2fcd43b88f1c9f6191ef7dd3.pdf
    • https://static.usrfiles.com/ugd/61f964_dfbe390d400a42ebbdf202833bb74b98.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_969ea69009514e45adcc731d2fff622d.pdf
    • https://static.usrfiles.com/ugd/c34eac_ffaf30199ee24c29a80d434136d06fc3.pdf
    • https://static.usrfiles.com/ugd/33a16d_a41aa1aea9f2433aaeedb0d2b55a58a7.pdf
    • https://static.usrfiles.com/ugd/22739b_db33eee6e4f94756b5ab0aceba8ce54b.pdf
    • https://static.usrfiles.com/ugd/cd79e3_6abf0d54791845989f05d36c3d37cc4a.pdf
    • https://static.usrfiles.com/ugd/f1780b_22c528e11ec14bc5909a18c9b6807068.pdf
    • https://static.usrfiles.com/ugd/7a359d_c94a518461934f42957ed7d654fe4f72.pdf
    • https://static.usrfiles.com/ugd/f51585_60da8733df214ec1b308e3742531683b.pdf
    • https://static.usrfiles.com/ugd/faa7ef_b8553fb358bc4bc1b4ab782e8ddf824c.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_off0000607d.bin
2aa9a7a39df83cd254cb56727e4d1a454a5f139937057afe5807760aa6e0477a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x607D 4672 bytes
font_01_sfnt_off0000705e.bin
aef3694f6ab5560cd64e2bf674bff1f5b67cb2613dc8965e687b9d2563cbb465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705E 3888 bytes
font_02_sfnt_off00007eee.bin
f8b9c7ce0e13d62d358f4e77b58e8e3f51a02c90cbac7ced732198a9565dedbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EEE 10172 bytes
font_03_sfnt_off0000a1f2.bin
9be5328b609eaee9120a8d59681a9c646c3cd30c2a95c02fa7131cbff73c2aa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1F2 17012 bytes

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