Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcda25852fe7ffcf…

MALICIOUS

PDF

50.1 KB Created: 2020-08-31 03:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cb637630684a1af0397fae390362164 SHA-1: bc710ba3082094687df271a7396d8032c7015190 SHA-256: fcda25852fe7ffcf960ef4629e9c7d21448bb5b00dd9c0056a1cca88b09c8b72
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.club/wix?keyword=study+abroad+programs+uf'. This URL is presented within the document body, suggesting a social engineering lure related to study abroad programs. The file also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm techniques used to distribute malicious content. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of malicious intent.

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=study+abroad+programs+uf
    • https://cdn.shopify.com/s/files/1/0431/8884/6753/files/5465754658.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/17098950396.pdf
    • https://cdn.shopify.com/s/files/1/0435/0512/3493/files/bomaso.pdf
    • https://cdn.shopify.com/s/files/1/0430/6812/9431/files/labanumuren.pdf
    • https://static.usrfiles.com/ugd/3bca44_a19eb73a26db4ac88a242738eadf5195.pdf
    • https://static.usrfiles.com/ugd/ce14f3_a49262dd2aec4ac6b1bdce2397e07f93.pdf
    • https://static.usrfiles.com/ugd/b8c837_66dc8210f9214acfbe9ec9d284a283d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1e65132d22e40e49b5d033b17b4eb19.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4565/files/74057786357.pdf
    • https://cdn.shopify.com/s/files/1/0434/5770/8193/files/lil_yachty_riley_from_the_boondocks.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/blue_white_a2_pump_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2694/8001/files/taxusobewixafasadene.pdf
    • https://cdn.shopify.com/s/files/1/0433/2912/6550/files/pdf_xchange_editor_spell_checker.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_off0000858a.bin
deacfa2a5c4fea01bff14cded37aa4f1a36f55f5728b26c86157ef7bcca97006		 pdf-font-stream PDF embedded font (sfnt) at offset 0x858A 5676 bytes
font_01_sfnt_off000098c1.bin
e091e1285199c47aae3976ad9cb7ef2f4c72d3dcd349d60caeee0781b02cabba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98C1 10248 bytes

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