Malicious PDF — malware analysis report

Static analysis result for SHA-256 68598baac4c04247…

MALICIOUS

PDF

39.3 KB Created: 2020-08-29 23:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7060f2d70721a86cfc840ac2da285e29 SHA-1: 5c7ca92784f5429b26c85d65ffce51030bb9d0d3 SHA-256: 68598baac4c042476b19b442b082a16462c4b5200b80b38d804148ead4b26e1a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One of the primary links, however, redirects to a known malicious infrastructure at 'ttraff.cc'. This indicates an attempt to lure users to malicious content, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=but+how+do+it+know%253F+the+basic+principles+of+computers+for+everyone
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6713/8470/files/apicultura_ecologica.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/high_school_basketball_court_dimensions.pdf
    • https://cdn.shopify.com/s/files/1/0433/6399/1717/files/agoraphobia_test.pdf
    • https://cdn.shopify.com/s/files/1/0440/3603/0629/files/mangli_sankranthi_song.pdf
    • https://cdn.shopify.com/s/files/1/0434/8837/9032/files/kejoxoxonelusilo.pdf
    • https://cdn.shopify.com/s/files/1/0445/8138/8452/files/94446916513.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/66320526531.pdf
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/united_airlines_contact_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7745/files/dabelomiladojegaparijubuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4158/files/93326715478.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058a7.bin
4f088b7a6a6d1983eeaf1ac1920e172b8dce628a2aa14616c9f24bf4288d6366		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A7 6044 bytes
font_01_sfnt_off00006d22.bin
32c6e73a2fc0920443782ec3d893ea06557b2a2b58cbbec06acec35db6816f99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D22 10804 bytes

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