Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae2b01fd0f938a4…

MALICIOUS

PDF

37.6 KB Created: 2020-09-01 09:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b098afb87884faff6f6837e586d3ae56 SHA-1: 13a6076d33e2f279aca7ea3163fb6aa8e410d682 SHA-256: 3ae2b01fd0f938a4e126cec05ce00f0ca45ae18ad1db4032eb4e13777a462419
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. This URL is presented within the document body, disguised as a link to piano sheet music. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious destination. The ML classifier strongly indicates maliciousness.

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/wix?keyword=libertango+4+hands+piano+sheet
    • https://cdn.shopify.com/s/files/1/0434/1982/8386/files/nibesi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71895612735.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/neferuzilizumatuxefemoror.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4087/files/xetezadujobuxopapuwuso.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8102/files/fevef.pdf
    • https://cdn.shopify.com/s/files/1/0435/3549/9418/files/yamaha_command_link_plus_installation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5686/5173/files/bootstrap_4_template_examples.pdf
    • https://cdn.shopify.com/s/files/1/0430/3106/8823/files/35619763040.pdf
    • https://cdn.shopify.com/s/files/1/0435/6499/0632/files/79722193412.pdf
    • https://cdn.shopify.com/s/files/1/0449/5376/3999/files/56549089127.pdf
    • https://cdn.shopify.com/s/files/1/0451/8638/4023/files/legend_of_zelda_encyclopedia_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_b832b9a38e744de4ad2ae6d6bb618ed0.pdf
    • https://static.usrfiles.com/ugd/54fa57_073d75828be94220b1a1cc83d6c7de88.pdf
    • https://static.usrfiles.com/ugd/2813e2_ab65054283da4270893b416fcfadc83b.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_60ac827ba8f74d7697190778055010c7.pdf
    • https://static.usrfiles.com/ugd/1b8612_f5a19a11a8df4c1ba5241aaf02be5e4d.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_off000055ea.bin
b02d97dc3e9a922a3f7f2b4b92203492f04616e2d583c410a2364dc64252b503		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55EA 5356 bytes
font_01_sfnt_off00006819.bin
4ba1d893ce5c8a7ae0791a3cf6057abefc7356bd7499e76b7be683f51a66884d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6819 9784 bytes

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