Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e201f90847906b7…

MALICIOUS

PDF

37.0 KB Created: 2020-09-11 17:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9666e5aa012c55ddddd545d1a16dd19f SHA-1: 076634afabf55d316918e32c454106d37c2b1e32 SHA-256: 4e201f90847906b757b34d11df5341ae2041838665809bc615df65525e8e38d5
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 external links, a common technique for SEO poisoning or redirecting users to malicious sites. One of the URLs, 'https://ttraff.club/wix?keyword=classroom+vocabulary+exercises+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on shopify.com, suggesting a link farm or redirection strategy.

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=classroom+vocabulary+exercises+pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2310/files/gepodezebazuzo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9453/1493/files/set_path_linux.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/bamexewepuso.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/nebidodobotudogelogalokil.pdf
    • https://cdn.shopify.com/s/files/1/0461/4707/6259/files/enormous_turnip_worksheets_printables.pdf
    • https://static.usrfiles.com/ugd/b96e41_c1a9679beec348f196657e1c3d1ae96c.pdf
    • https://static.usrfiles.com/ugd/62e2c1_cf04c06776244c2f9ee21b524cb86f79.pdf
    • https://static.usrfiles.com/ugd/e4d7df_163d3ed432e345e582487611b3e0b1fb.pdf
    • https://static.usrfiles.com/ugd/ea9bdf_bc5822216fbf45f0bfb6c0b42f29bc3d.pdf
    • https://static.usrfiles.com/ugd/784815_2624a3af0fa24fc0ac5259c9afb9165c.pdf
    • https://cdn.shopify.com/s/files/1/0454/5501/6088/files/weissbluth_atoms_and_molecules.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/psychology_ciccarelli_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8375/files/tejewojuropikabarali.pdf
    • https://cdn.shopify.com/s/files/1/0432/0916/2907/files/vuvixuje.pdf
    • https://cdn.shopify.com/s/files/1/0434/9257/3336/files/bewiwokuzubunujipag.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6dc46405b074502859cef609ce0d915.pdf
    • https://static.usrfiles.com/ugd/353d00_e781bbbc4931406a9af44d18085995ea.pdf
    • https://static.usrfiles.com/ugd/b0c8dc_4bdf5807e0634416b77e6b72043d0974.pdf
    • https://static.usrfiles.com/ugd/762c1a_6ff9ba831ba14589b172b7b581ececc4.pdf
    • https://static.usrfiles.com/ugd/dd6616_cee49fc178194181b4c524d13ee534e7.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_off0000529e.bin
3abcd7c57529fc375d1396fbfa627e2db682af8297097bd639c50aa46c4be68b
pdf-font-stream PDF embedded font (sfnt) at offset 0x529E 5576 bytes
font_01_sfnt_off00006586.bin
62df4d81f8281d6976dd6942540d62b90fe34975d18196b12babffe68745fa85
pdf-font-stream PDF embedded font (sfnt) at offset 0x6586 9656 bytes