Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f1cfa5e7095361…

MALICIOUS

PDF

41.8 KB Created: 2020-09-01 13:53:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bfb9c7e883938cfdcb16f1a2f21d750 SHA-1: d420642631231de5d018d540c57af2a4b6115b0a SHA-256: d9f1cfa5e7095361df072675b0b1204bea77ca74da7b1f58556224bb499bb9e1
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text suggesting it is an educational worksheet, likely a lure to encourage clicks on the malicious URL. The presence of numerous links to static.usrfiles.com and cdn.shopify.com, while many are benign, contributes to the overall link farm characteristic.

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.me/wix?keyword=internal+vs+external+locus+of+control+worksheets
    • https://static.usrfiles.com/ugd/b8c837_4d88feceb1d34f07a902010f38dc25c3.pdf
    • https://static.usrfiles.com/ugd/0511f5_72765c1d863b4e54b172968cb66847f3.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fcc576ca8564adf9185efd0e838529a.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9529/files/26910824783.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6549/files/fiche_mtier_guide_touristique_pole_emploi.pdf
    • https://cdn.shopify.com/s/files/1/0436/3180/4574/files/gitenugojoxix.pdf
    • https://static.usrfiles.com/ugd/6d59ab_3582c3333a4b4d37a3e39b44002a2a6c.pdf
    • https://static.usrfiles.com/ugd/37428b_f2be741743fb4927af5153443bec78ee.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_2ec4a23146844105b5cff94f187a3df8.pdf
    • https://static.usrfiles.com/ugd/b8c837_702437aa5afd4e388172c573124b41df.pdf
    • https://static.usrfiles.com/ugd/b8c837_c33b2911070047f5bcef2f751b8f7695.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_off0000660d.bin
46c5eada6949b7618fa1acdfa6324abc59f9dfdbf7124ad8f7b898983e843151		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660D 5188 bytes
font_01_sfnt_off000077c7.bin
18f594274a2ef99a01a9b9f6fd80d5d0a1d09db92b7d3e2dd0b820f4954ead0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C7 10200 bytes

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