Malicious PDF — malware analysis report

Static analysis result for SHA-256 a026e98ef9d9c985…

MALICIOUS

PDF

121.1 KB Created: 2020-08-31 00:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f54fa6562ac3128bca3e5478f887e2e0 SHA-1: cb6d166c54895784d42a7ad8263ed612522e5585 SHA-256: a026e98ef9d9c985941d63e4abf3b7027f32243dd6b4c188be51a9688d661054
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=avengers+movie+list', suggesting a lure to a malicious site disguised as content related to movie lists. The presence of a PDF link farm further indicates an attempt to distribute malicious content or drive traffic to compromised sites.

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=avengers+movie+list
    • https://static.usrfiles.com/ugd/b8c837_e63621dc43304f2ba6b4accc554dcec6.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4506ad533c04849b2b77043daac6fa3.pdf
    • https://static.usrfiles.com/ugd/87a178_95d99872aec2433b984011e62b2e7f50.pdf
    • https://static.usrfiles.com/ugd/d63aaf_05a690905cce4ef296505f2cdcd1bd32.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5b4b82739394ef4bb6a35ed2618f455.pdf
    • https://static.usrfiles.com/ugd/defdb4_6ce0f1614709409bacf2f51baf5b6736.pdf
    • https://static.usrfiles.com/ugd/529dbf_9d35ddf5cdfd4ee8a15a11db0f959858.pdf
    • https://static.usrfiles.com/ugd/cc14e4_cd30198f8c4e47e9abbd4682eb268512.pdf
    • https://static.usrfiles.com/ugd/b8c837_8f125fccc3ae4256ac7835c55a89af43.pdf
    • https://static.usrfiles.com/ugd/ca300b_9d8ecdb8d1e8426fb959e280c6dcb536.pdf
    • https://static.usrfiles.com/ugd/b8c837_9cb0c7f7e05c460f8636592472dbac9e.pdf
    • https://static.usrfiles.com/ugd/9374a7_e3d20f8f5fb749c0bb3c36a534c80b4e.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/brooke_tyner_brumett_twitter.pdf
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/in_search_of_the_myreque_quick_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/carroll_diagram_worksheets_ks2.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_off00015f37.bin
8e472a6f75e379560547333b3b7e0494ff29f8ffec09066606bd65a4e20f15ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F37 13724 bytes
font_01_sfnt_off00018c56.bin
6a1fd8d8a4ea4726e2aed31a49d6600dc0b3a9db6a09b0483741cf9578e18656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18C56 4632 bytes
font_02_sfnt_off00019bf9.bin
e0c07049c48f0ad5fced38aac9bd582f249ca6a4d3170337e6e0fb6044cab43f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19BF9 13952 bytes
font_03_sfnt_off0001c8f6.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8F6 4324 bytes

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