Malicious PDF — malware analysis report

Static analysis result for SHA-256 9826c4ba7b9e042d…

MALICIOUS

PDF

42.1 KB Created: 2020-09-18 16:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 515cc472331226dcf71eae4b8ad76244 SHA-1: fefbf65275574e5d93c7c7f3925fd1684431b715 SHA-256: 9826c4ba7b9e042d1116a0933fbe4de47750fdb7edaf036eebfdeb56cbc5e642
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, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=kitchenaid+dish+washing+machine+manual', is designed to lure users by appearing to offer a manual for a Kitchenaid dishwasher. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents, likely for SEO manipulation or to obscure the malicious redirector. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing or malware distribution site.

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=kitchenaid+dish+washing+machine+manual
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/fovobazotejomoguwil.pdf
    • https://cdn.shopify.com/s/files/1/0431/3828/5725/files/paulo_coelho_aleph_francais.pdf
    • https://cdn.shopify.com/s/files/1/0437/1723/0741/files/exponential_functions_worksheet_precalculus.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4564/files/horse_bill_of_sale.pdf
    • https://cdn.shopify.com/s/files/1/0434/2644/7525/files/5255904237.pdf
    • https://325ed9af-5ca1-491c-9df9-fdeaeb1da397.filesusr.com/ugd/370b54_0eb039652a7f41f4a86f2e7e0610d3e5.pdf?index=true
    • https://19968da9-276a-4c75-bc1e-f58c50a9ee96.filesusr.com/ugd/6cf392_3d4f9568b63a4c5aa00050cf5828af5c.pdf?index=true
    • https://321c3e78-ce97-4fd3-908a-825b6c997533.filesusr.com/ugd/5c9621_bbfcafd891604db0b641463f4325f68c.pdf?index=true
    • https://87de799f-19ec-4596-9c68-be8dd887da96.filesusr.com/ugd/bba345_bd0c0cfb5a4b46048b97803a04878e01.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0460/2531/0367/files/danogaxokowufudofawiba.pdf
    • https://cdn.shopify.com/s/files/1/0431/6482/7805/files/watadeperapaxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6615/files/52396053154.pdf
    • https://cdn.shopify.com/s/files/1/0448/3615/9645/files/celebrate_it_wedding_invitation_templates.pdf
    • https://b0abd5ec-2912-4ad4-abeb-7ab372b20454.filesusr.com/ugd/9ea91e_794c179bfccf4b3f97db19f74456035e.pdf?index=true
    • https://910d8cd3-fa27-456d-8fc1-7615a80dcf6c.filesusr.com/ugd/027f51_d03dc28427a2459c8494322616d989f1.pdf?index=true
    • https://ac905007-9264-4b88-ad8b-1fd8ed4f549c.filesusr.com/ugd/54fa57_b811bd85754946e3996806f79d98006b.pdf?index=true
    • https://55ebe430-fb02-43f0-82eb-41fd2304fb39.filesusr.com/ugd/234f58_5c330a72de8549049326a19dfaa8acb1.pdf?index=true
    • https://4c1c5d33-d5c5-4e71-8300-6b8feb42dba5.filesusr.com/ugd/bcb9fd_318e63ce917041d392ea3845c7e38000.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/
    • https://4c1c5d33-d5c5-4e71-8300-6b8feb42dba5.filesusr.com/ugd/bcb9fd_318e63ce917041d392ea3845c7e38000

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006457.bin
734242eb4860050c4078ba6dbfdc97c8d1afbba00fb03f6cd340b85c55b0e0c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6457 5316 bytes
font_01_sfnt_off00007662.bin
077cb23e1d899fb291fff9c505e8aad9b86b4803cd3fee002ffa200754dd9be9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7662 10748 bytes

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