Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c78bb704ed985d2…

MALICIOUS

PDF

40.3 KB Created: 2020-09-01 10:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d0c14e5501515be1e2dd0bc5f0c01f0 SHA-1: b96ea5bf1ef41298713973038b66431a3abb5d18 SHA-256: 0c78bb704ed985d2a6726d14bc3e8dad5190fae5dd05b1586cddca605af6b8d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Spotify account checker' and a URL that appears to be a redirector. This suggests the document is designed to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

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=spotify+account+checker+x+slayer
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cdb50c_6c3039d5cfd64c518d7fd5dfe4576971.pdf
    • https://static.usrfiles.com/ugd/b8c837_c05f146b81c2431ca25b7161eda455d1.pdf
    • https://static.usrfiles.com/ugd/756799_24ecc6189fa84ca6952b956bd4e9b8e2.pdf
    • https://static.usrfiles.com/ugd/4b68be_b5f4f85fbedc41ba9c4e6f31d2b3eab4.pdf
    • https://static.usrfiles.com/ugd/804ff6_358e10b3acf84f2aabb38e82b6fc8960.pdf
    • https://static.usrfiles.com/ugd/09c3c7_dbb5cdabaa3946819331d716b4ef28b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_13904c4f41c241c282d43c591d4faf7b.pdf
    • https://static.usrfiles.com/ugd/b50c55_ba34dad3cf8b4a0fa81c1b977695a127.pdf
    • https://static.usrfiles.com/ugd/b8c837_342b465ca8d741a7bccbb3cb0d096842.pdf
    • https://static.usrfiles.com/ugd/97634b_3a0e824b913f4aadab3942e4eb28ded7.pdf
    • https://cdn.shopify.com/s/files/1/0435/5224/3861/files/99218595864.pdf
    • https://cdn.shopify.com/s/files/1/0431/2724/2914/files/biochemistry_book_by_satyanarayana_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/54328019986.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/93648010674.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9160/files/43560497674.pdf
    • https://static.usrfiles.com/ugd/b4a829_a43dd33e92224e1fada4239ecace4a81.pdf
    • https://static.usrfiles.com/ugd/b8c837_115748a129394b8687d7017c60d30874.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004798.bin
b97e506f9e6ea088ca9853000a9aa0c23e168cf29159ba7c50e0fc0b6f4397d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4798 5440 bytes
font_01_sfnt_off00005a25.bin
6b9b88e37cf712e94ec103f74a5e1e31edf1a68d69358576e2d9142f75fb01ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A25 10216 bytes
font_02_sfnt_off00007d51.bin
8c1e3298cb301b6aa2c2aeff0a89e1cafee6626e56d5ffa98ad52a7598c40df9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D51 16168 bytes

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