Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e282db2e738f3f…

MALICIOUS

PDF

114.0 KB Created: 2020-08-07 00:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05776738c0e36ec1dd0935d0a5113bb4 SHA-1: 6d4762f18a63ee3d6b128125f1b5520306acda19 SHA-256: e2e282db2e738f3f35d5924634b98ff48bf21b75e3d40109523136afa8050319
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to its inclusion of a large number of external links, a technique often used for SEO manipulation. It also contains a direct link to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL, suggesting the PDF's primary purpose is to lure users to malicious infrastructure. 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.
  • 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.
  • 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.cc/pify?keyword=epidemiologia+b%25C3%25A1sica+bonita+pdf
    • http://potiduz.shinytwo.com/uploads/1/3/1/6/131606201/zekameveti-letasevi-vonutozen-molubex.pdf
    • http://wugomoz.amyhafemanndesign.com/uploads/1/3/1/3/131380005/0828edf74.pdf
    • http://files.dkgca.org/uploads/1/3/1/4/131483305/dapepabobalu_mewux_lakem_rovofono.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8285/files/nudilinadadifajavew.pdf
    • https://cdn.shopify.com/s/files/1/0431/0568/1557/files/jowokunaduforefofotepiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8089/8973/files/xomedodalunoxaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/55418200771.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/octopus_facts.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/jufakexolanulidav.pdf
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/42571343810.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3683/files/aircraft_registration_codes.pdf
    • https://cdn.shopify.com/s/files/1/0429/1949/3785/files/98552433090.pdf
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/nirali_prakashan_fybsc_physics_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/rubolaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/4303/6053/files/free_automotive_repair_manuals.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_off0001784f.bin
c62001d6d4b55e82e5c602d75da34d551ff2e952039e1c719e835c35781885e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1784F 5708 bytes
font_01_sfnt_off00018b22.bin
cc433ecf9bcaee030eaa7c02d9eb9f6a79ced42d0af82baf9d87ed042d6edbcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18B22 14552 bytes

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