Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6df024198d8d70d…

MALICIOUS

PDF

51.2 KB Created: 2020-08-31 01:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ffb513db42306ab03f2e909b121da23 SHA-1: e4d91a0aad4a611d18c8a416a45a851940187f2f SHA-256: d6df024198d8d70dfa91bd91dc6146c5729f40762871820b222cc9594605fddb
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=healing+developmental+trauma+pdf'. Additionally, it exhibits a PDF link farm with numerous external links, many hosted on 'static.usrfiles.com'. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, contains the same URL, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=healing+developmental+trauma+pdf
    • https://static.usrfiles.com/ugd/3b0c81_22b57315f36947789fd65384da1317b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc902adb3b6844d4bca6e174d3780f15.pdf
    • https://static.usrfiles.com/ugd/19ce5d_db1b3a118a9b459f86af30cdd5c9afff.pdf
    • https://static.usrfiles.com/ugd/0a0016_7c9fa63ad87b494bb4138d3233b70c1d.pdf
    • https://static.usrfiles.com/ugd/3ab5ed_951cc28e46be44289df34cabccb98cc4.pdf
    • https://static.usrfiles.com/ugd/353d00_568edbeae09f4104a75fb6bb7c4b264f.pdf
    • https://static.usrfiles.com/ugd/913720_f58597295c794c6ebec8acd5fc0429e4.pdf
    • https://static.usrfiles.com/ugd/cac9e4_dcda81217e444ef38348daad5ed84dff.pdf
    • https://static.usrfiles.com/ugd/9c0842_6e3df91350484813b0eda274e8951b61.pdf
    • https://static.usrfiles.com/ugd/e2f197_c35ba031c3bb45e4b3b2db460594f68b.pdf
    • https://cdn.shopify.com/s/files/1/0436/9301/5190/files/polyatomic_ions_pogil_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/81408165856.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/fozipepusurevinexi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7300/files/76011612133.pdf
    • https://cdn.shopify.com/s/files/1/0435/1705/1039/files/50318441431.pdf
    • https://cdn.shopify.com/s/files/1/0464/7888/5032/files/wireless_router_buying_guide_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/mexidolup.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/basic_english_grammar_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2269/7126/files/20419618245.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_off00008a0d.bin
f697f104bc49b5d79cba0f3507f44eb494f6daf8d33aa28bef9a3dca2b70e1c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0D 5204 bytes
font_01_sfnt_off00009bb0.bin
3fc895f93e96a38d746c499c0319e96101a07e083fd9ea454f4d1f11dd8cfd94
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB0 10436 bytes