Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a244979b62d7aed…

MALICIOUS

PDF

42.5 KB Created: 2020-09-09 03:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c67e4f1021490c8bbab12348aeca1d0 SHA-1: 11feeca0aa1a6fdefa2dd9f4864cf36469d293b2 SHA-256: 5a244979b62d7aed97bfb4085c462d8f9e795775dbee17327449c034306ccf7f
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, disguised with a keyword related to a cribbage game board template. The document also exhibits characteristics of a PDF SEO link farm, with numerous embedded links pointing to various PDF files, likely to manipulate search engine results or distribute malicious content. The primary malicious URL is https://ttraff.link/wix?keyword=cribbage+game+board+template, which is the most critical IOC.

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=cribbage+game+board+template
    • https://static.usrfiles.com/ugd/f91cf1_08fb8152a00646feb7a180b1dc73aa48.pdf
    • https://static.usrfiles.com/ugd/e745be_530d003ac7bd44c18c6dae1bb2a0839d.pdf
    • https://static.usrfiles.com/ugd/79cb75_7dfc7fd1f13c4373aad96d0a64833c0c.pdf
    • https://static.usrfiles.com/ugd/e481ce_524c7164b0f443928c39e299917b6ed4.pdf
    • https://static.usrfiles.com/ugd/83d902_cff38b9afd434ae2a0d078b35acde4ac.pdf
    • https://cdn.shopify.com/s/files/1/0454/6845/0968/files/99923634066.pdf
    • https://cdn.shopify.com/s/files/1/0434/0577/0909/files/bantu_education_act_essay_300_words.pdf
    • https://cdn.shopify.com/s/files/1/0441/4291/9832/files/hbse_open_form_online_2019_date.pdf
    • https://cdn.shopify.com/s/files/1/0431/3654/9018/files/cities_skylines_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/6935/7728/files/keneviwimafutu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9930/7673/files/paguw.pdf
    • https://cdn.shopify.com/s/files/1/0428/4727/3116/files/varuzezetitekima.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/julanefiwozuxam.pdf
    • https://cdn.shopify.com/s/files/1/0432/1257/0783/files/butesofidezu.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_off00006963.bin
c13ed5bd30fece057fb9afe25cbac9eb8b550b1f7f4379b49f8979bb4d1cda9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6963 5144 bytes
font_01_sfnt_off00007ac1.bin
923973ccfe770d5b7105053a144ab686c147db7dfb65e67fc16f544aa931ca60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC1 10120 bytes

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