Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2e0636676bd014…

MALICIOUS

PDF

37.8 KB Created: 2020-08-29 07:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3285615ac05d38bcd13ce4c9dc133bd6 SHA-1: ce7447a9197ca1823376cf32fca6d5caf15a9b73 SHA-256: cb2e0636676bd014b841a62a84ef6617e7f6ca7c93dbd7338891e29b9ed3bcd3
92 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL https://ttraff.com/wix?keyword=acls+2015+post+test is the primary indicator of malicious intent, likely serving as a lure for a phishing or malware download. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/wix?keyword=acls+2015+post+test
    • https://static.usrfiles.com/ugd/b8c837_d0cbd055e73c47578eaa4a79dbf1f0b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_22c967cb24a741c786d850dd4552cf43.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a0b84e4901942d6b3c174ace78e1377.pdf
    • https://cdn.shopify.com/s/files/1/0428/4314/4359/files/viponozaxiluf.pdf
    • https://static.usrfiles.com/ugd/b8c837_1074e07e95a047e0bbf8a828a259661f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2bf95712b18f42708f6b0e0c05816a00.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/12824930837.pdf
    • https://cdn.shopify.com/s/files/1/0430/9703/0817/files/xakomum.pdf
    • https://cdn.shopify.com/s/files/1/0430/8199/0293/files/51245367064.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_off000057fd.bin
0167b26ca1edd60f95d7fcdd09a208770a612abc593be85c8ef60532c0a6c34c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57FD 5060 bytes
font_01_sfnt_off00006954.bin
e0002c460205e667408ab85ed708eec8e0553cdfc65d52539d1071711724573a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6954 9896 bytes

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