Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bda87fd55e96258…

MALICIOUS

PDF

44.5 KB Created: 2020-09-16 14:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00357abe611281da36b33d40ef17cac7 SHA-1: a46eaedb8b1e75b2958a3f9f3769387e7d49f74a SHA-256: 8bda87fd55e962583adcc4a2601b4a51dbb6a2a9fcf131b449f03f0f8430a788
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Spin to win game of life' and the malicious URL, suggesting a social engineering lure. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the malicious nature of the embedded URL.

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.link/wix?keyword=spin+to+win+game+of+life
    • http://putalu.thecottageatcedarburg.com/uploads/1/3/1/0/131070792/8656048.pdf
    • http://saxewat.ocacolorrun.com/uploads/1/3/2/8/132814439/wivajopumu-dabikafelimore-bukufuzikami-goloxeno.pdf
    • http://files.creativelyyourscustomcakes.com/uploads/1/3/0/8/130874254/16c439de0da.pdf
    • http://files.c3initiative.org/uploads/1/3/0/9/130969435/tamogelijosakam.pdf
    • http://nisavemix.nhcss.org/uploads/1/3/0/7/130740393/920249.pdf
    • https://cdn.shopify.com/s/files/1/0435/7832/7203/files/36822043933.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/mijobedokojojamisegez.pdf
    • https://cdn.shopify.com/s/files/1/0432/9357/3288/files/6717169513.pdf
    • https://cdn.shopify.com/s/files/1/0485/5450/8453/files/61890393693.pdf
    • https://94b79f5c-60c9-425d-a58d-7e3cf6bb80ab.filesusr.com/ugd/49f5ef_a836d7af4b824e41a9ab6ebf78fa1f62.pdf?index=true
    • https://6df7fdb1-f4ff-45f2-b786-fabf9970a0f7.filesusr.com/ugd/45fd81_34deaad1740f4143aac1f72b67ac6d57.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0446/7536/7065/files/physics_james_walker_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/2218/7685/files/mapa_turistico_biarritz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000645c.bin
de47db92bf3f5fc51c91a90cec9a4790fad33f2756616adfc92d32a4e0b11531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x645C 3136 bytes
font_01_sfnt_off00006fa3.bin
07311ae531e0fd5727d1b24c67227435bedb26252ae2c62ed682871cb5baebfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA3 5140 bytes
font_02_sfnt_off00008132.bin
2098c0a6830ced55ff3521b55dddeeaf28917b0604be9709817d025111ca257b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8132 10476 bytes

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