Malicious PDF — malware analysis report

Static analysis result for SHA-256 792efc76ec5b21c1…

MALICIOUS

PDF

32.6 KB Created: 2020-08-29 21:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3e2be79ca8847fd0302aaa7f85fbd5e SHA-1: 4dc199158927d494bda64aeff7925f02eff2981a SHA-256: 792efc76ec5b21c182a4c0eeea6be7caefbebd8b47af535c3d05c6b061a5f912
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/wix?keyword=leaving+on+a+jet+plane+original+mp3'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 3

  • 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.
  • 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.ru/wix?keyword=leaving+on+a+jet+plane+original+mp3
    • https://cdn.shopify.com/s/files/1/0432/8708/5222/files/california_zip_code_map.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/mekufelijunagazopepiteno.pdf
    • https://cdn.shopify.com/s/files/1/0436/9996/2024/files/sunotikekasafumanid.pdf
    • https://static.usrfiles.com/ugd/83f04e_c7c375aa717340ae97a8ed48fe8c86f8.pdf
    • https://static.usrfiles.com/ugd/11f207_93921fb6bca4463bac061a286c0e1008.pdf
    • https://static.usrfiles.com/ugd/b8c837_aecdab9270964012a74f003896c4ad80.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/xudixanonudapoxed.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/76548204977.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000413d.bin
6e2f87c86c3a787adecdba04db9252d222db46c60f3852cdd033c35ab962ac99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x413D 5200 bytes
font_01_sfnt_off000052f3.bin
8190c55c2882fc31b29c2b95c16bc5f8f77c7003788b1a9cd75bdc2b01e9c935		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52F3 10300 bytes

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