Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b156f2e50f9a10…

MALICIOUS

PDF

32.1 KB Created: 2020-10-11 11:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea07139aeb35529be87f6942a9623a17 SHA-1: 1e6be682c05913ca6fe9a9e6de93c84723f7fb3c SHA-256: d9b156f2e50f9a10db783ce71069260d94295be3e0f4422f4762e000f6830f13
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, https://gettraff.ru/strik?keyword=scarlet+heart+ryeo+ep+17+eng+sub+dra, which is indicative of a phishing or malware distribution attempt. The document body's content, referencing a TV show, is likely a lure to entice users to click the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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://gettraff.ru/strik?keyword=scarlet+heart+ryeo+ep+17+eng+sub+dra
    • http://files.piratereaders.org/uploads/1/3/1/4/131408798/1b018dd905.pdf
    • http://kejexet.eastvay.org/uploads/1/3/1/4/131454106/dorivaferagubonexi.pdf
    • http://zuwav.modernbarandhome.store/uploads/1/3/1/4/131482995/1514775.pdf
    • http://files.zulal.org/uploads/1/3/2/3/132303147/192b29.pdf
    • http://files.liquidskyd-vices.com/uploads/1/3/1/4/131408942/begineba.pdf
    • http://files.handhtacklellc.com/uploads/1/3/2/6/132682623/3dc83c.pdf
    • http://files.jimhallahanconstruction.com/uploads/1/3/1/6/131606396/6151628.pdf
    • https://cdn.shopify.com/s/files/1/0496/4473/2580/files/wordpress_terms_and_conditions_page.pdf
    • https://uploads.strikinglycdn.com/files/d9de72a2-6dfe-4fd1-ab4c-01d0d2cebdce/23428994298.pdf
    • https://uploads.strikinglycdn.com/files/6c4092fb-7e0d-4e30-b3af-88d607ac300a/38610457617.pdf
    • https://uploads.strikinglycdn.com/files/f600920e-3460-46ed-a082-306c5d6fd9e3/4877481120.pdf
    • https://uploads.strikinglycdn.com/files/c8f0be4e-5318-455c-8423-34e0fafa4590/18373304214.pdf
    • https://uploads.strikinglycdn.com/files/f77e602b-3d98-42e2-8d4f-4105387d16a2/wovuwuwokivevakulediz.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_off0000420b.bin
1947d307e74486c6969a114bbd98f3cc74f063e701566f58df3e862c3ce78da1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x420B 5812 bytes
font_01_sfnt_off000055cb.bin
dbb7114c3b54e910284a8418a13cb54449ed8b615e8f6b3a9cadff5eff82b1ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55CB 8692 bytes

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