Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8ef77adfd0d626…

MALICIOUS

PDF

39.5 KB Created: 2020-08-30 00:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12a6efee9c2b514f5c5b4785a69c71ab SHA-1: d5f11feaff9d7e83843bcc950b7666528d058b21 SHA-256: cc8ef77adfd0d626b926b43a9205e23316beaf0703fa88b6dd1daef7cfcb2a15
92 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The embedded URL 'https://ttraff.me/wix?keyword=dominos+test+pdf' is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to the malicious URL, reinforcing the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.me/wix?keyword=dominos+test+pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/anatomia_bochenka.pdf
    • https://cdn.shopify.com/s/files/1/0431/8769/9876/files/zekif.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/tijuvedejomaf.pdf
    • https://static.usrfiles.com/ugd/6846fe_9e87220cf98e441d950d8f2785d44707.pdf
    • https://static.usrfiles.com/ugd/5b5da7_1a9f965a6d564475ae1ef8c0c0392e10.pdf
    • https://static.usrfiles.com/ugd/9219f8_227a670623834935bf86822260bdf456.pdf
    • https://static.usrfiles.com/ugd/b8c837_c1c55af24b0a4521af701ff3025378bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d82c79d688e4fb28c8073b1860b3c42.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055b1.bin
d43707158b893ad57ff8ebc4e42a217194a15beeaa411e33931a4166f4dc859c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B1 1712 bytes
font_01_sfnt_off00005dc2.bin
6555ba7a2a76068ec604cc6b83754389aee28e92467d7906ee8a927d6a16784a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC2 4848 bytes
font_02_sfnt_off00006e33.bin
d5fbf2e001503c17800240c027509354983c99033d2f23638e1d47bae1a8a238		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E33 10348 bytes

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