Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9acad0d17ba07ec…

MALICIOUS

PDF

51.6 KB Created: 2020-08-31 03:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c419c46842f6e1cafc8063aec02e2e0 SHA-1: e72cd4aeb75f420d9a965e8d1067c9d15cfbdcd7 SHA-256: c9acad0d17ba07ecd9f9d3c4044ce19e45188d2143850b80a71bc562ac1baf0c
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 PDF files hosted on Shopify. One of these links, 'https://ttraff.cc/wix?keyword=origen+del+griego', is identified as a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to lure users to malicious infrastructure.

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=origen+del+griego
    • https://cdn.shopify.com/s/files/1/0431/7511/6961/files/9647820545.pdf
    • https://cdn.shopify.com/s/files/1/0433/9279/4773/files/bantu_prophets_in_south_africa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jisabisagubimebusogapasof.pdf
    • https://cdn.shopify.com/s/files/1/0433/9764/4449/files/bengali_letter_writing_book.pdf
    • https://cdn.shopify.com/s/files/1/0439/4798/3006/files/mf_158_fiche_technique.pdf
    • https://cdn.shopify.com/s/files/1/0431/2471/9773/files/can_t_hold_us_marching_band.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1395/files/gufawol.pdf
    • https://cdn.shopify.com/s/files/1/0439/5024/3995/files/carson_mccullers_short_stories.pdf
    • https://cdn.shopify.com/s/files/1/0457/8190/9660/files/84872303621.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_797da56d280a435ea6c301923de01081.pdf
    • https://static.usrfiles.com/ugd/b8c837_ac53635124eb441db042ed01f2acdd7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ff9511d5cd44828b7cc1a251935ddcf.pdf
    • https://static.usrfiles.com/ugd/0789d5_1b5009e93c5940a983a67bc4530e4fb8.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006675.bin
120928f8768877ed5c6bf9b380abba1a7980031bb2d0342331eb468afe738b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6675 4340 bytes
font_01_sfnt_off00007527.bin
c066bd64106a564c9b64c08455b960c05ed58aaf105a8ac811b8a1bdd7625c31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7527 12256 bytes
font_02_sfnt_off00009cda.bin
909e1284cb5cf330e420864cb10833f98e2764078d03bc4f2432c8e182b13f15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDA 16200 bytes
font_03_sfnt_off0000b22e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB22E 4324 bytes

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