Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ecfac77fd0b6529…

MALICIOUS

PDF

35.9 KB Created: 2020-08-14 09:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80bb4da623ba578aaca44be83b23a306 SHA-1: c72ef8d7331eb08e8a8a781781fed2e64404977c SHA-256: 8ecfac77fd0b652945aa2274a038f89a241ed50714ba77cb1929d5cfa0621c97
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary link pointing to a known malicious redirector at `https://ttraff.ru/wb?keyword=botanical%20line%20drawing%20peggy%20dean%20pdf`. The heuristic `PDF_SEO_LINK_FARM` indicates a mass of external PDF links, suggesting a tactic to manipulate search engine results or distribute further malicious content. The document body itself is largely unreadable binary data, but contains the malicious redirector URL.

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/wb?keyword=botanical%20line%20drawing%20peggy%20dean%20pdf
    • http://files.authenticallyyoubranding.com/uploads/1/3/0/8/130873794/povobadafe.pdf
    • http://files.engineercharliezhao.com/uploads/1/3/1/8/131856666/mamir.pdf
    • http://files.claremccomishceramics.com/uploads/1/3/1/6/131607374/migugujitanozow_bejovamegub_bolubip.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/adosphere_4_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/judegesuzopo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/28347176509.pdf
    • https://cdn.shopify.com/s/files/1/0439/3854/5819/files/66597303106.pdf
    • https://cdn.shopify.com/s/files/1/0440/9648/7576/files/hubble_telescope_images_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/simple_under_construction_html_page_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/bojokupekidosavu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/baking_school_the_bread_ahead_cookbook.pdf
    • https://cdn.shopify.com/s/files/1/0428/7827/1651/files/akuntansi_keuangan_menengah_2_dwi_martani.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32177526878.pdf
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/5126321449.pdf
    • https://cdn.shopify.com/s/files/1/0431/4398/7357/files/18652629164.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_off00004ff8.bin
1dcb7edf8db41653b6df48ba34b845fa84878999950c0828ba79a1a412ab8acd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FF8 5388 bytes
font_01_sfnt_off0000626f.bin
e7a10cb35a157a559872136be7c12b52017532803fc0acc1b90695f426c5796f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626F 9468 bytes

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