Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89f6ebc65168dd0…

MALICIOUS

PDF

40.1 KB Created: 2020-09-18 06:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 668780e33bb95caa6be4878e3b3729f9 SHA-1: 67356890342582e3bcdd176dc78c3704bd94ae24 SHA-256: f89f6ebc65168dd032174ea70414400d9f7647bec400a465e7d5c269be6147e9
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a large number of embedded links, a technique often used for link farming or redirecting users to malicious sites. One critical heuristic flagged a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector link. The file also contains numerous links to Shopify-hosted PDFs, suggesting an attempt to disguise malicious links within seemingly benign content.

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=generator+manual+transfer+switch
    • https://cdn.shopify.com/s/files/1/0434/3758/8646/files/south_shore_collaborative_hingham_ma.pdf
    • https://cdn.shopify.com/s/files/1/0454/7362/8326/files/bazigeduvununu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9411/4465/files/55744629858.pdf
    • https://9e992797-7d95-4877-b9f9-6661c947ec08.filesusr.com/ugd/a2d007_916ea3d574e048a8a54d667891e947ff.pdf?index=true
    • https://615405c9-4dc6-4476-880a-55da96ca8141.filesusr.com/ugd/237bf7_b9fcc88c632d4d5bb559561d9b010c26.pdf?index=true
    • https://05756875-ab7c-4274-9342-0cb45193bd4e.filesusr.com/ugd/0789d5_b079d27a663648ca85eb8f4a244a2de2.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/world_war_1_propaganda_worksheet_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0427/9877/6487/files/wuvazanupifezurata.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3784/files/jusopabilarugaxekedajo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9037/files/94697270413.pdf
    • https://e8f28e8e-5de4-49dc-bf6b-49f2a92aeddb.filesusr.com/ugd/66f3f9_f3644194481045ec8e28026f4236e148.pdf?index=true
    • https://98ba7302-872c-4e9b-8acc-655765f0a63f.filesusr.com/ugd/ac8c68_a28e55d97eee464f8b15f8fb60bbbc06.pdf?index=true
    • https://8fbf34e5-104b-4f80-b18f-b525afa647fc.filesusr.com/ugd/daca0d_dc136961bd884c66978dc97028541f39.pdf?index=true
    • 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_off00005910.bin
2b8c874171ac39be721c1fc156c10dafdd86b430eae0bb486a27dca633616a26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5910 5244 bytes
font_01_sfnt_off00006ace.bin
e50880effa6168ee1d01120f1f0c26792ef55f42949dd2a06db4568799c9ff86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACE 12916 bytes

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