Malicious PDF — malware analysis report

Static analysis result for SHA-256 879f39ae17e2ddf0…

MALICIOUS

PDF

41.2 KB Created: 2020-09-17 20:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fb036133a1588122908e0650fe0dc0d SHA-1: 1797e2b4bebfc3f4729ade53489b316b2491f0f1 SHA-256: 879f39ae17e2ddf0122a504f4178ad539eb3f4cfef91d0a2cfa8df40365aaf83
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, a technique often used for phishing or redirecting users to malicious sites. The document body, though obfuscated, contains text suggesting it is a tutorial, which is likely a lure. The heuristic firings confirm the presence of a malicious redirector link and a link farm, indicating a coordinated effort to distribute malicious content.

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.club/wix?keyword=ccna+wireless+tutorial+pdf
    • http://sejutok.5starbuild.com/uploads/1/3/0/7/130775540/vaduvipeworaj_kedafibutodoxek_bebanuramoluj.pdf
    • http://riziwu.summitorthosports.com/uploads/1/3/1/3/131379730/697df50df4d.pdf
    • http://files.rockasmile.com/uploads/1/3/1/4/131453522/594e3dea7c94.pdf
    • http://nutiva.yalestreetwc.com/uploads/1/3/1/8/131856543/nadinege.pdf
    • http://files.thesaddlexchange.com/uploads/1/3/0/8/130814245/fowegubegixivuriwusu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/noviwuvado.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/dragon_ball_abridged_android_13.pdf
    • https://cdn.shopify.com/s/files/1/0429/5609/5644/files/nerineponepejapajixoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/levod.pdf
    • https://cdn.shopify.com/s/files/1/0439/5224/2856/files/12521716069.pdf
    • https://cdn.shopify.com/s/files/1/0438/4073/3341/files/kusoguzodilokuwa.pdf
    • https://39bb3ce8-319b-474e-b20b-1a7b84b16fdc.filesusr.com/ugd/843280_cc6c944775d24b4e81eb64c3fba70a19.pdf?index=true
    • https://5291804d-64f4-4373-988f-b755d0912a97.filesusr.com/ugd/5899d5_8185b1dabe3247f4b9dbb774974b99d2.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_off0000637e.bin
3b3842555fd61f0b713b8a7820509c1ad4262bcc6be99b0c7a450795ed370f54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x637E 5148 bytes
font_01_sfnt_off0000751e.bin
04aa81bda1bccd04c4c19594abacda9af7bd37c725c98938c6f3f7a8e62e33ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751E 10256 bytes

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