Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd5ad1837b564f8f…

MALICIOUS

PDF

34.0 KB Created: 2020-08-29 06:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a83968ecfc8027e5c16f77b6464dbbc SHA-1: a12285bec5ab7992ca9a141c3f1abaa7e3023b37 SHA-256: dd5ad1837b564f8f55c362a0da2ec10ca5d3b0e4b4396e81880314ab51c85e0f
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, many of which point to external resources. One critical heuristic firing indicates that the PDF links to a known malicious redirector infrastructure at 'https://ttraff.cc/wix?keyword=a+practical+guide+to+the+runes+lisa+peschel'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect the user to malicious content. The file was generated using wkhtmltopdf, a tool often used to create PDF documents from web 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.cc/wix?keyword=a+practical+guide+to+the+runes+lisa+peschel
    • https://static.usrfiles.com/ugd/b8c837_19eb905ce2e84e5c9984de8a8255a2fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_c16040f2b1494269afa06d1499528da4.pdf
    • https://static.usrfiles.com/ugd/b8c837_012066c4100a4d72aa42819e8794940d.pdf
    • https://cdn.shopify.com/s/files/1/0434/9784/8996/files/lekoveberufuxi.pdf
    • https://cdn.shopify.com/s/files/1/0447/4011/6629/files/b._ed_ignou_form_last_date.pdf
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/byk_ceven_trke_okunulu_ve_aklamal.pdf
    • https://cdn.shopify.com/s/files/1/0435/3517/1738/files/carros_de_fuego_piano.pdf
    • https://cdn.shopify.com/s/files/1/0427/4873/9740/files/tonafefavujadumosozuseja.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e08d37e535c43a5b82f4c78f1e535e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_7da62ddf428d4411bc5e387e0441d49a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6eb42687800c443eb52a2112910756ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_fac4c59fa8104c24828d72295bbfbdf9.pdf
    • https://static.usrfiles.com/ugd/b8c837_d76afc95570843bbb83e292015836584.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_off000046f7.bin
5ecdf8cc759b6326c9e8c3a28d4a9909cc1d050be81648b9e4034ac0aa1d39d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46F7 5324 bytes
font_01_sfnt_off000058f7.bin
6d9941208c0958eb3ecfd5d137246644c4d0b925f9e51152dac4b43c1a8c7c8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F7 10384 bytes

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