Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a26e3999010586…

MALICIOUS

PDF

47.2 KB Created: 2020-09-09 05:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3fe197e5dda925e18855f00772c8149 SHA-1: 4400721d48dd78e5fef24b0c3a26ef414a4aa3c6 SHA-256: d9a26e39990105861b4112abcda41ba803706875989bf21b7bac0dcc804af6a2
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.club/wix?keyword=opioid+induced+constipation+treatment+guidelines'. This URL is presented within the document body, disguised as a treatment guideline. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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.club/wix?keyword=opioid+induced+constipation+treatment+guidelines
    • https://cdn.shopify.com/s/files/1/0432/4311/0564/files/building_materials_and_construction_technology.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1295/files/wenexusodagusiruzofotuza.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1973/files/angai_geete_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9427/0371/files/vukefijowegufijuwajem.pdf
    • https://cdn.shopify.com/s/files/1/0432/1440/5793/files/26357478661.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/98550996997.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54903558396.pdf
    • https://cdn.shopify.com/s/files/1/0432/8321/8588/files/astronomy_today_eric_chaisson.pdf
    • https://cdn.shopify.com/s/files/1/0434/5813/4182/files/37859804180.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1685/files/ave_maria_beyonce.pdf
    • https://static.usrfiles.com/ugd/c70c35_83da2c6f1abf4c3db98e20debc5c42b3.pdf
    • https://static.usrfiles.com/ugd/a76634_4d4b4e4e801a4fa78dd318a806173fb3.pdf
    • https://static.usrfiles.com/ugd/0aab01_d57d3d47edd3476dbfc5dbdfe1a231c6.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_off00007adb.bin
6a29732c4db5645f8bfa601f870b9ceeb6e4bad5e26d85c0004ba09b0e1b78a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ADB 5420 bytes
font_01_sfnt_off00008d2f.bin
3d0fbc2819c01e23186570187f2795b04b2a207f18742d44d25a472e6015b6de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2F 10224 bytes

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