Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db9a87ba1febb94…

MALICIOUS

PDF

44.0 KB Created: 2020-07-30 02:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57b5bf6013ab6c018cba1324a7e6373c SHA-1: c93eefa3873c1741f41955257c4da8025833a6d8 SHA-256: 9db9a87ba1febb94d08b81190e53ad87069c2ff3a2c77dafe52bc2ace516f152
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm used to obscure malicious destinations. One of the primary links, 'https://ttraff.ru/pify?keyword=bams+2nd+year+syllabus+2020+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to reference a syllabus, suggesting a lure to disguise the malicious intent. The presence of a link farm and a malicious redirector indicates an attempt to drive users to harmful content.

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.ru/pify?keyword=bams+2nd+year+syllabus+2020+pdf
    • http://files.bobdyerspeaks.com/uploads/1/3/2/6/132695543/4575605.pdf
    • http://files.qstreetband.com/uploads/1/3/2/6/132683000/futonogenigaxo.pdf
    • http://files.lueveasdreamtoreality.com/uploads/1/3/2/6/132696029/4315368.pdf
    • https://cdn.shopify.co
    • https://cdn.shopify.com/s/files/1/0440/3278/6597/files/fileguzino.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/werojogerepus.pdf
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/82895799241.pdf
    • https://cdn.shopify.com/s/files/1/0434/5433/3093/files/karitu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/18912731306.pdf
    • https://cdn.shopify.com/s/files/1/0433/6674/4216/files/58751535469.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/budomodidirirezubaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/7296/2203/files/71326194888.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4567/files/39088389609.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/37667514761.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_off00006f7c.bin
66b65718e4f01602d9dcc1d8fcd9531207e94c6660558c785e27ebb58eb14e5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7C 5396 bytes
font_01_sfnt_off000081ad.bin
c4b7bc76f05a59fbb61bba30c497164852f1c000c81ea92ee11c2c3cd5e7c074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81AD 9784 bytes

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