Malicious PDF — malware analysis report

Static analysis result for SHA-256 7026846b6022dc7d…

MALICIOUS

PDF

35.9 KB Created: 2020-09-17 18:38:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41fa25f9dc18bba4e30a35d4355f4687 SHA-1: d055744a7893353727968dbf6d678e0ac4a7706b SHA-256: 7026846b6022dc7d15b6fb6c01bf9d37e326febed4cead43beb1dd7ac95767e9
94 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. The document body itself appears to be a garbled mix of text and URLs, including the primary malicious redirector URL, suggesting it's not intended for legitimate user consumption.

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.me/wix?keyword=el+komander+ft+calibre+50+qu%25C3%25A9+tiene+de+malo
    • http://funara.oxfordbakingcompany.com/uploads/1/3/0/7/130775889/dizugomukuxuru_tulekajowabu_bapefipefu.pdf
    • http://rerod.justactstrategy.com/uploads/1/3/0/7/130776760/4902304.pdf
    • http://mobilu.academicpreparation.com/uploads/1/3/0/7/130776023/lunovez-fijutebiwa-migonejid-pagufilupak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://288b053e-6181-465b-8557-0198263118f4.filesusr.com/ugd/6cabbb_4390c6331bf04b11b08f1b3d07b2f3b0.pdf?index=true
    • https://5c823295-5ab3-4352-b608-98bf240b9fc9.filesusr.com/ugd/9ef0c3_9234972bf05e406390261c183f103f35.pdf?index=true
    • https://7169411c-60c3-49f5-ade8-4b67c77c9123.filesusr.com/ugd/ab0441_7d7561058de54926bd2e4e251261df38.pdf?index=true
    • https://38ec70f3-25e9-4379-9d1a-156987ab790f.filesusr.com/ugd/668a47_23644e52a5704a82ae24935f3ba23579.pdf?index=true
    • https://106825b1-2ccb-4d80-9dd1-80c28c38403e.filesusr.com/ugd/fa6f14_9f47d2bdb713492e8a032e643c26557a.pdf?index=true
    • https://fec9e6a7-f063-4766-813b-9577959c03ea.filesusr.com/ugd/74e905_3df6304835d74d5ea7ff7fd73d1d4898.pdf?index=true
    • 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_off00004ade.bin
304ceefbd55720bc21b47bc852d64b390ba97632a27d13ce5604425030cb56db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ADE 5684 bytes
font_01_sfnt_off00005dd9.bin
f59835ff1504fd205085da3bdf3afe67b6cd8c59d829b799e8617bc3dfc727ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD9 10740 bytes

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