Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9662b4aa2d5d25…

MALICIOUS

PDF

54.5 KB Created: 2020-08-28 05:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 941f6dc1278a565460f520b156761c76 SHA-1: 83e15e9490c133893dfe9e2f885136e1aab9f1b0 SHA-256: fa9662b4aa2d5d25d5519c51fb44e8faecc996adf96d3a5230c71b2617394c2a
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the primary links, 'https://ttraff.ru/pify?keyword=specification+for+structural+steel+buildings', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a coordinated effort to distribute malicious content. No scripts were extracted, but the PDF structure itself is the delivery mechanism.

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.ru/pify?keyword=specification+for+structural+steel+buildings
    • http://files.ohayosensei.com/uploads/1/3/0/9/130969405/7210945.pdf
    • http://bagakivu.teniolaodumakinde.com/uploads/1/3/1/6/131636648/9425541.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/23613323855.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/fafepexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/liduzinurogepimarunofusa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7480/files/deped_tambayan_curriculum_guide_in_mapeh.pdf
    • https://cdn.shopify.com/s/files/1/0431/6610/5759/files/convert_dxf_to_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8136/files/report_absconding_employee_uae.pdf
    • https://cdn.shopify.com/s/files/1/0432/6290/2438/files/mamito_churchill_show.pdf
    • https://cdn.shopify.com/s/files/1/0446/9896/0026/files/solidworks_2014_part_i_basic_tools.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/48414550643.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/lituwerevabuzob.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/deconstruction_theory_and_practice.pdf
    • https://cdn.shopify.com/s/files/1/0430/3391/9645/files/surat_al_kahfi_latin_dan_artinya.pdf
    • https://cdn.shopify.com/s/files/1/0434/0436/1895/files/54175261143.pdf
    • https://cdn.shopify.com/s/files/1/0443/5014/4668/files/41676963500.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000768c.bin
63270adfa4595970647a68753e92d12321c82732a62a97072316cc79494948da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x768C 5448 bytes
font_01_sfnt_off000088fb.bin
79c72fbd033974fd482492cf92f9c059c3d566d950d0586622dc60d581628590		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88FB 6620 bytes
font_02_sfnt_off00009a88.bin
20871313defc1efed3576e30eac9608c8adcf0c1f094e001ead3365cfa4802d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A88 10428 bytes
font_03_sfnt_off0000be22.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE22 4324 bytes

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