Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d413f550290974…

MALICIOUS

PDF

40.3 KB Created: 2020-08-29 15:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65ef68a101af237e19530ff687220925 SHA-1: f6a50e0620554ade18cd5e117c0316137e0800ce SHA-256: 23d413f5502909746e5ec2eed31553cb7e3faa2f8fc4cd301439d67ba0b49a4f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=immanuel+williams+ucsc'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. No scripts were extracted from this sample.

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.cc/wix?keyword=immanuel+williams+ucsc
    • https://static.usrfiles.com/ugd/affaa6_7a7bbe8ba9c645b29cdc329215b50c82.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ad506e16d354203ab18ad88794e9d11.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab7b918c0fa84a0a8ba6ecca5dad7653.pdf
    • https://static.usrfiles.com/ugd/b8c837_fdbfd45da51b41ff8c33ee0b174a7a53.pdf
    • https://cdn.shopify.com/s/files/1/0434/2248/2582/files/8032663025.pdf
    • https://cdn.shopify.com/s/files/1/0432/3796/5986/files/client_meeting_follow_up_email_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/6327/8758/files/xuwirapogirera.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2334/files/fejizefow.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7252/files/of_studies_by_francis_bacon_summary.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/belief_in_a_just_world_scale.pdf
    • https://cdn.shopify.com/s/files/1/0439/4971/9720/files/14665102895.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/tesawaginubet.pdf
    • https://cdn.shopify.com/s/files/1/0432/8521/7436/files/pdf_file_sample_paper.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_off0000605b.bin
dd0c3868bdd6f5fa1226a1750598892e16fe0571a42b67a9e155a7681dc851c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605B 4880 bytes
font_01_sfnt_off000070df.bin
1af4e467368eb90e5ed1b3f3a9ddbbb68d79036431abc5354df7f5d47909ae0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DF 10512 bytes

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