Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1884e82038e83bf…

MALICIOUS

PDF

44.3 KB Created: 2020-08-12 22:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bea2dd785bad9e48a865d5d30673069 SHA-1: 311ce1b513fbf4068214f28d63882ab1040581b8 SHA-256: b1884e82038e83bf2894b739663075d72f384508b60554b6ce43813a5d7ea6b9
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as a search result for ebook readers. The document also contains a large number of links to external PDFs hosted on Shopify, likely part of a link farm to improve search engine ranking for the malicious redirector. 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/pify?keyword=what+s+the+best+ebook+reader+that+supports+pdf+and+epub
    • http://files.darrennixon.com/uploads/1/3/1/4/131437576/xuxopawax-sudeja-vobovuragiboj.pdf
    • http://files.createeducate.com/uploads/1/3/0/8/130814605/jenonezoxu.pdf
    • http://puvug.greenworldwriting.com/uploads/1/3/1/4/131409090/7709274.pdf
    • http://files.dunnclowns.com/uploads/1/3/2/8/132814050/6754353.pdf
    • https://cdn.shopify.com/s/files/1/0432/0506/6913/files/jekatalisenaxemurep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0933/4696/files/bikavexanuxele.pdf
    • https://cdn.shopify.com/s/files/1/0434/1094/8254/files/bigekivofaku.pdf
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/1040647460.pdf
    • https://cdn.shopify.com/s/files/1/0428/5494/0828/files/vigirosim.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/zuzabinevoduguwivirelasun.pdf
    • https://cdn.shopify.com/s/files/1/0432/3740/8936/files/tazasabumevukuzijinunabus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzawubemamomavokam.pdf
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/kexefavofu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1761/7057/files/xiwanemefakusodebed.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7907/files/soncino_talmud_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/87892905676.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5587/files/25977566799.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_off00006e08.bin
9751ee0739be9d1536e40758cd2f27812348ac46510c2890ae2953dbd0e55298		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E08 5312 bytes
font_01_sfnt_off00008015.bin
5e8e1538af33eb6224fe7435eaa1874695f68996bef4c0963506b3fefb57c200		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8015 10500 bytes

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