Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2827e990ac1042…

MALICIOUS

PDF

34.6 KB Created: 2020-08-30 00:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bd4750b63ed3294d39b548e2f18d730 SHA-1: ae784d015180b519515f9c3913cec6ca43620ede SHA-256: 5e2827e990ac104262af7163a0eebb98f9301c0713054e0f46f60e54784f20bd
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though heavily obfuscated, contains the same malicious URL and a lure related to downloading a movie. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector URL is sufficient evidence of malicious intent.

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=download+my+love+from+the+star+hindi+dubbed
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0461/9124/7511/files/acoustasonic_150_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/how_to_read_stock_market_index.pdf
    • https://cdn.shopify.com/s/files/1/0432/6565/4946/files/report_rai_3_stasera_streaming.pdf
    • https://cdn.shopify.com/s/files/1/0428/6418/1404/files/5491059998.pdf
    • https://cdn.shopify.com/s/files/1/0446/8729/4617/files/gexexomusoderoletonezela.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/66403030122.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6d52c594b6346f6a852138a574443f8.pdf
    • https://static.usrfiles.com/ugd/4bb894_5a91b3319bd345b6bfcb7dbd3e8f2434.pdf
    • https://static.usrfiles.com/ugd/b8c837_019a09f021114217a5f58feee6ad44b6.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a0a.bin
44c7476d2f2e6c69e915883b408e22a8baed3b4b986d6f37d6849bd16c4b2543		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A0A 5540 bytes
font_01_sfnt_off00005cd3.bin
dc4c4bfb844a7cee62a7d3c0cbba60560d58df1b297e704e2bc1cb9ad1f86a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD3 9648 bytes

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