Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f483d33beb7cdf…

MALICIOUS

PDF

33.7 KB Created: 2020-08-29 02:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 447ed825a55e4c79a5a3d328dff5bbdf SHA-1: e311490bcccdf5e81018850ba7db453a13a5898f SHA-256: 04f483d33beb7cdfb9cc1d1afbe406f643feb73f7b8e5c67309eeac1f1b8878a
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for downloading movies. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into visiting harmful 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=hollywood+movie+tamil+hd+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_d3c2845f2aaa41ab86eed1bb345d4214.pdf
    • https://static.usrfiles.com/ugd/b8c837_029771cc94794afeb1f2d724146955ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_a204aadcb32040fea2a3631dabc818db.pdf
    • https://cdn.shopify.com/s/files/1/0437/2434/1400/files/quran_word_meaning_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0430/8254/7361/files/davilipubowasagigoni.pdf
    • https://cdn.shopify.com/s/files/1/0433/9823/4270/files/ranebigunexebibipugemigu.pdf
    • https://static.usrfiles.com/ugd/b8c837_889bbe83afd54d46bbfef5d9a3a0254c.pdf
    • https://static.usrfiles.com/ugd/b8c837_be7e26099c5243aa8b9e799859944a25.pdf
    • https://static.usrfiles.com/ugd/b8c837_db717865b5ba41c1bcb094b2cef30467.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_off0000493c.bin
6fe1212d34e6fa9e9c609134afbdf053902302029bc69deb6f433d060596e3a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x493C 5008 bytes
font_01_sfnt_off00005a36.bin
8772f689d89ca8b101f31a4f0cc5236f25750d790f414dca535ad4ae8835c84a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A36 9472 bytes

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