Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0383d361e33450…

MALICIOUS

PDF

43.1 KB Created: 2020-09-17 17:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66d94d9b81b517e76de39ffa35b54b28 SHA-1: d6fe41a5722ed56b3eabd3c2e5ba549facc60216 SHA-256: bf0383d361e3345021d9e4b8594c8b26dd8c9598491046d0f34c95f487f7085b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to domains associated with link farms and redirectors. One critical heuristic firing indicates a link to known malicious redirector infrastructure at 'https://ttraff.club/wix?keyword=abc+format+technical+writing'. The document body, though heavily obfuscated, contains this same URL, suggesting the primary purpose is to redirect the user to potentially harmful content. No scripts were extracted from this sample.

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.club/wix?keyword=abc+format+technical+writing
    • http://files.artandbeyondart.com/uploads/1/3/1/0/131070178/vovanizujixi.pdf
    • http://files.grapevineoasis.com/uploads/1/3/1/8/131856158/magabuzexosazug-xixutovo-zojozum.pdf
    • http://womagim.docmazo.com/uploads/1/3/0/7/130775388/320498.pdf
    • http://zuwulo.transformationalbodyworkniagara.com/uploads/1/3/1/3/131383837/pekub_robifibuwaw_sodarigisazoto_lekoxixejegavol.pdf
    • http://lowelir.lawdialogue.in/uploads/1/3/2/6/132696323/xupuwi-mokelitawi.pdf
    • http://kaxupipi.wvsabc.com/uploads/1/3/2/8/132815176/54bfbf338.pdf
    • https://cdn.shopify.com/s/files/1/0429/3571/3958/files/sarosotamuvevusafonawuwuz.pdf
    • https://cdn.shopify.com/s/files/1/0438/5888/6806/files/james_lee_community_center_summer_camp.pdf
    • https://cdn.shopify.com/s/files/1/0459/5456/4255/files/xowosevusanobitakezerem.pdf
    • https://cdn.shopify.com/s/files/1/0482/0241/6285/files/amen_and_attack.pdf
    • https://cdn.shopify.com/s/files/1/0428/4104/7206/files/99559070138.pdf
    • https://cdn.shopify.com/s/files/1/0434/8447/9641/files/71441656209.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/vopumodalesu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/linagejodamoruwer.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/avidemux_2._6._9_free.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_off00006acf.bin
6f2de9cc0ffc95f25ac79cdce321f91c7a3611dd2586a275881b75efb1b0866e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACF 5340 bytes
font_01_sfnt_off00007ce6.bin
d8d75ba3755d91bb13d6e66ec67b90617e286a127f31173f46e791543122f9eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE6 10056 bytes

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