Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b7c2c96fdb8d0a…

MALICIOUS

PDF

39.5 KB Created: 2020-09-19 02:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb025d4321a8c9ff9a33f556f0b65e78 SHA-1: 375ef8212eb09eb9d03c07ff1d578479260ae631 SHA-256: 79b7c2c96fdb8d0af5b654afe4c5bd65648c58d4b9eeee0b817d7afa8dafd71b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious redirectors or are part of a link farm. The document body, though partially corrupted, contains text related to 'Mighty guy 2 unblocked' and includes the primary malicious URL, suggesting a lure to a gaming-related scam. The ML classifier strongly flagged this PDF as malicious.

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.club/wix?keyword=mighty+guy+2+unblocked
    • http://merej.berrybrook.us/uploads/1/3/1/3/131384401/8440ca.pdf
    • http://files.blueribbonhomeimprovementinc.com/uploads/1/3/2/6/132695663/bonitisuwo-wuzojib-lixugiwupobo-libipofepifej.pdf
    • http://relum.catchyadreams.com/uploads/1/3/1/6/131636826/8df3a.pdf
    • http://guvoku.ibelongamen.com/uploads/1/3/2/6/132681268/2663435.pdf
    • http://basirolug.playdaysdoncaster.com.au/uploads/1/3/1/6/131607662/gibes_bojulovotuwe_gilub_fajir.pdf
    • https://f579fcda-cbac-4cc0-be17-bc4d09912ac4.filesusr.com/ugd/345929_cc2f36bda46044888d4ed8579987ff9d.pdf?index=true
    • https://7051e2ff-7083-43a9-bd58-14ce77b8c030.filesusr.com/ugd/1c8c1e_23cf24c12d0b4e91a10e957dac287281.pdf?index=true
    • https://254a614a-9932-45f8-abf2-6e1cd3a22051.filesusr.com/ugd/b7306e_15194f16aebc4be59b35035bc86987fc.pdf?index=true
    • https://0d724192-ad3d-4706-8b5f-746ea552cbfa.filesusr.com/ugd/682d1c_fcf83d9a4b024cf58313cb73191e8dcc.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/1610/9736/files/38489959608.pdf
    • https://cdn.shopify.com/s/files/1/0427/6004/4710/files/everlane_pants_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/0925/9158/files/58277026038.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/pidibel.pdf
    • https://102bbc57-8b28-404a-8cad-719fdc7011f8.filesusr.com/ugd/0baf77_431fd039ccd440889049233eba15ef31.pdf?index=true
    • https://7a8e89ce-e7d7-481f-9b59-b333b2adcd5c.filesusr.com/ugd/76b6de_fb402c8ad6b14fd88648fb6f7f4bcc5a.pdf?index=true
    • https://c81913ef-db4b-484a-9454-c500c9b9c22f.filesusr.com/ugd/9c58c5_5ce27093ed9f4cdcaab863c152c54ba9.pdf?index=true
    • https://ddfe7a7f-300b-491b-a89e-2fd46ad1a1ca.filesusr.com/ugd/237bf7_819ba1d70d504082b4a692adfa337a3f.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cdc.bin
55268859a2c381fc9f12dd6229b3155f970773136057bf200ec7a05bdfa4619d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CDC 5160 bytes
font_01_sfnt_off00006e85.bin
f2f7f163a43fc4e63dee0db9376ab0a67f20c7d2a8b28294085172ee00cdf41a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E85 10080 bytes

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