Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e2bf5e08cf653d…

MALICIOUS

PDF

36.8 KB Created: 2020-08-30 00:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c44bf53cefde399847dfbff06d53e2a SHA-1: ef1e210c31de33311e6f3dd9be61ee45531a0f1b SHA-256: 65e2bf5e08cf653d7a9e89ce29cd35707aa1f8ae8ccd7e8d6faa2d751ff32108
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one pointing to a known malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Genki English free download song', suggesting a lure to trick users into clicking the malicious link. The presence of numerous external PDF links also indicates a link farm strategy, likely for SEO poisoning or to distribute further malicious content.

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.com/wix?keyword=genki+english+free+download+song
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5584/0409/files/tsf_launcher_themes.pdf
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/pukegukavubebesomuvabe.pdf
    • https://cdn.shopify.com/s/files/1/0464/6040/3880/files/18039365143.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5143/files/vimesekonek.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f55594e5fbb4190bff4b28a406ba1ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4d71394db514285b0e877aaeb746780.pdf
    • https://static.usrfiles.com/ugd/26481d_617d961bae68438ba56417df1398434b.pdf
    • https://static.usrfiles.com/ugd/b4a829_7f7431d51d514a0f8536c2c1d0792737.pdf
    • https://static.usrfiles.com/ugd/576447_68adc395ebd7458e905abacde1a36cbb.pdf
    • https://static.usrfiles.com/ugd/735189_d7268a1c33cb41e8a0238ed6d0710d34.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005248.bin
fe525859276126aa2640d162da809dbce8aeec76d1af0206938ea3c9ab210f5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5248 5356 bytes
font_01_sfnt_off00006494.bin
36f072ff565d6dc558a3891b9fd0f2fa3776772fa26c9f0c95aa3590be21f63d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6494 10124 bytes

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