Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a7f4d89215445df…

MALICIOUS

PDF

41.5 KB Created: 2020-09-18 02:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e31270132f10d03ad88bcee88f44b44 SHA-1: 5077cb566833857a7813b3ff0a94757cd10026dc SHA-256: 7a7f4d89215445df61439cd31902cd604feca40698073a44449fc63b23105f11
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=parent+portal+hsd153', is designed to lure users into clicking it under the guise of accessing a 'parent portal'. The file also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains, likely to obscure the malicious redirector. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of a phishing or scam attempt.

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.link/wix?keyword=parent+portal+hsd153
    • http://files.lakendragarrison.com/uploads/1/3/1/3/131383954/0c915.pdf
    • http://zogego.callanjames.co.nz/uploads/1/3/2/8/132814930/2df2b925d9ddc.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gubiwunezekubukezo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9462/1862/files/conventional_agriculture_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/8386/6018/files/setixojuposo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9975/8498/files/symptoms_of_hiv_and_aids.pdf
    • https://67258115-f70e-49a7-8a75-587b18f555f4.filesusr.com/ugd/234f58_45f4e0bd67354760be08df8d82eaff15.pdf?index=true
    • https://83ca5f7d-fb09-40eb-a1e1-fd8f76682386.filesusr.com/ugd/4fb05f_b87502bad96b49358aea26d7d49fa144.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0438/3693/2253/files/13429397301.pdf
    • https://cdn.shopify.com/s/files/1/0432/6106/7428/files/bootstrap_background_image.pdf
    • https://cdn.shopify.com/s/files/1/0439/8468/3166/files/dobowukinoditaragalewob.pdf
    • https://cdn.shopify.com/s/files/1/0439/0046/9403/files/wogexutuwewibaduvusisufe.pdf
    • https://cdn.shopify.com/s/files/1/0436/4405/9806/files/arm_strengthening_exercises_for_seniors.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_off0000639e.bin
1d3c9c4b36aade4a0f6f2b693c1fa549bba68e90026f8d075807b1a1f6c31920		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639E 5388 bytes
font_01_sfnt_off000075ed.bin
d32b442f2f01b5e3b8d992a7eae44e64d00b3893b3378a17c21aef19671ac6ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75ED 10392 bytes

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