Malicious PDF — malware analysis report

Static analysis result for SHA-256 e88a707761add0a9…

MALICIOUS

PDF

46.9 KB Created: 2020-08-31 07:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f5b3b4d0c3df1e0877d274c789dd5f7 SHA-1: db30cd8d41bdd7dacfe8184ff001eddef1fa01ca SHA-256: e88a707761add0a9f5727ab1036c42130e80330716bd56a36a52c8c019c490f7
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to other PDF files, a technique often used for SEO poisoning or to obscure malicious content. One of these links redirects to 'https://ttraff.cc/wix', which is identified as a known malicious redirector. The document body itself is heavily obfuscated and appears to be generated content, further supporting the 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.cc/wix?keyword=das+proposi%25C3%25A7%25C3%25B5es+abaixo+relacionadas+com+cin%25C3%25A9tica+qu%25C3%25ADmica+a+%25C3%25BAnica+falsa+%25C3%25A9
    • https://cdn.shopify.com/s/files/1/0436/3550/7358/files/32734489837.pdf
    • https://cdn.shopify.com/s/files/1/0432/6391/8246/files/multiple_choice_answer_sheet_1-_100.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/email_format_html_vs_plain_text.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9cb98e7aaa244ebb303e8d3e69481bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_66510327cdb34ea39dd840bf1933f4ff.pdf
    • https://static.usrfiles.com/ugd/91e123_3679f0d7dc744c329e3c0f2ece6cc1c7.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13652925252.pdf
    • https://cdn.shopify.com/s/files/1/0434/2117/1873/files/dixegifavujokuvis.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/15214600450.pdf
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/62664341220.pdf
    • https://static.usrfiles.com/ugd/69695d_3f156c490cbf40e18d205983d86b5e28.pdf
    • https://static.usrfiles.com/ugd/b8c837_be0fd589c49c4cc1b8f514fae60e0fe6.pdf
    • https://static.usrfiles.com/ugd/77eba6_c0a16299e5d4470dbb630f1e98326b95.pdf
    • https://static.usrfiles.com/ugd/b8c837_040c7584a9a24ecc9a3cd31e372d9080.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_off000068f7.bin
942d4ccea4aed354dda8606c3b9ba6829ced3f4b0bb3d9caa73d3abf1f69b8d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F7 6344 bytes
font_01_sfnt_off00007d66.bin
1776ccc313f1a9ce4b5456fad529ecfd6ac3a328df3c28d45c5bd4b26c9cd956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D66 15920 bytes

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