Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b8c376679da028…

MALICIOUS

PDF

40.8 KB Created: 2020-08-31 02:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83e70c5bc325aa76ab84ba2f623ad3e4 SHA-1: fed9493fcf0543c800f6e26decbba2fd0dfc4bbb SHA-256: 38b8c376679da02821471ad25e830635eda27e1c7b82a1f33e49efba801fec7c
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, characteristic of a link farm. One of the primary links, 'https://ttraff.com/wix?keyword=aadujeevitham+novel+in+malayalam', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other PDF files hosted on Shopify, suggesting a lure to a malicious site. No scripts were extracted, and the primary malicious activity appears to be redirection.

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.com/wix?keyword=aadujeevitham+novel+in+malayalam
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/tudigupemu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5226/9717/files/84303272621.pdf
    • https://cdn.shopify.com/s/files/1/0430/8349/7623/files/argentometri_jurnal.pdf
    • https://cdn.shopify.com/s/files/1/0466/2974/8901/files/98377963419.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/19108754958.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/55570851311.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/nofisediritidus.pdf
    • https://cdn.shopify.com/s/files/1/0428/0785/3223/files/linear_equations_in_two_variables_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2902/files/migedimezu.pdf
    • https://static.usrfiles.com/ugd/b8c837_2d4662859d2d47b78cebc99902649495.pdf
    • https://static.usrfiles.com/ugd/b11f6d_100aef63385240199479516bd5abc5c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7cc99874ed64601ab3f186fd024d79d.pdf
    • https://static.usrfiles.com/ugd/63022f_05389e3cb3e1487d893e469438a19664.pdf
    • https://static.usrfiles.com/ugd/3649d2_f8c0ba9168c647a19e4cd3bd8cb170bb.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_off000063b9.bin
56297e9916ff6010c19e9416df8d4e62c80add57d1d2bbb7fd09c49f4b7e75d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B9 5020 bytes
font_01_sfnt_off000074b8.bin
471791d416e5d027a7dc661ea29fe6c4eac05c872750fb5e14628917cb0b797f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B8 9904 bytes

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