Malicious PDF — malware analysis report

Static analysis result for SHA-256 82157af3bc04b5c3…

MALICIOUS

PDF

44.5 KB Created: 2020-09-20 05:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53a94eb5401f42314d435fcf26b87dc9 SHA-1: c713f81f5f8ee8d011e2a0836dce75eb4e25d097 SHA-256: 82157af3bc04b5c33f5adfafd95e7bbfd641475be37ee90652a41be3cec3f675
120 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.club/wix?keyword=professional+guide+to+diseases+10th+edition+citation, which is part of a redirection chain. The document's content, though partially corrupted, suggests a lure related to a professional guide, likely to entice clicks on the malicious link.

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=professional+guide+to+diseases+10th+edition+citation
    • https://5354fd25-6717-48d1-8a87-8fce034a1f33.filesusr.com/ugd/2a1429_d464bc20b5f3470b83e12d292c8ce935.pdf?index=true
    • https://aae6e6d0-a540-4b63-a0dc-69a931174af2.filesusr.com/ugd/dcf9ad_7a2faa220c064e50b5c90906a054d837.pdf?index=true
    • https://873079b9-c17f-4ca9-b8f1-5be35a4eb34a.filesusr.com/ugd/e56fe2_e14065b6b36e47f8b57024cff4e006ff.pdf?index=true
    • https://2c3ee70c-efcf-436b-a471-64b969cea293.filesusr.com/ugd/aec2ea_1a7cc57df8c74b5bbbc6798bcea511c4.pdf?index=true
    • https://899cd052-da8e-4461-b915-9d20bbb75d11.filesusr.com/ugd/1479de_fd43023b30be481ab116f827be8fa2de.pdf?index=true
    • https://9b08be33-d3c3-4c57-b561-d758a9a6c5dc.filesusr.com/ugd/bb05c1_82b848bd8d04479b95ed34de43240598.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/formele_brief_schrijven_engels.pdf
    • https://cdn.shopify.com/s/files/1/0451/1780/0602/files/33372619393.pdf
    • https://cdn.shopify.com/s/files/1/0438/2952/6688/files/bujimasatopela.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7174/files/sololuri.pdf
    • https://cdn.shopify.com/s/files/1/0431/6423/7988/files/neputirulatewura.pdf
    • https://cdn.shopify.com/s/files/1/0429/0147/1388/files/mowazike.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4870/files/beginner_yoga_routine.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_off00006fca.bin
e5b57ef20a5be668db7103a89820dbd5de41861b4f0e9ec020dc29a81796d919		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCA 5476 bytes
font_01_sfnt_off0000826b.bin
6b8cf41c9c7f0f409c6dd7ed8af3cee90358507147642100828abe29bcc966d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x826B 10212 bytes

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