Malicious PDF — malware analysis report

Static analysis result for SHA-256 90658b93894b021c…

MALICIOUS

PDF

35.4 KB Created: 2020-09-07 00:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90f633e6ebac0b44c652dc212d99c072 SHA-1: e095b3631f3e0866aba77134ecb39564bcd2c5af SHA-256: 90658b93894b021c3d6ccb1cfbd6327a505ffbd4515cdd2fb713a84fc19d048c
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, disguised as an educational worksheet. The document body, though heavily obfuscated, contains the same URL. This suggests the primary goal is to redirect the user to malicious infrastructure. No scripts were extracted, and the PDF structure itself does not indicate further exploitation beyond the initial redirection.

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.link/wix?keyword=oxidation+and+reduction+worksheet+gcse
    • https://static.usrfiles.com/ugd/135178_6c0fbd422cd44ac3b83613e3a10b8ccd.pdf
    • https://static.usrfiles.com/ugd/b6edda_16d461c099914cd48fa4d98838a81f0f.pdf
    • https://static.usrfiles.com/ugd/02beb7_5213e096728d45479c29f7531831c73c.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_9b50cddbeb9545d5b8301d7c8f098955.pdf
    • https://static.usrfiles.com/ugd/bd5c68_3931cee5cbd043bd8f9373f3819fe38b.pdf
    • https://static.usrfiles.com/ugd/590778_2fe63ba2185d4b4a84b8b35ef8dc5331.pdf
    • https://cdn.shopify.com/s/files/1/0432/5359/6310/files/kutijuwofinebafalokarota.pdf
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/how_to_install_macos_sierra_on_virtualbox.pdf
    • https://cdn.shopify.com/s/files/1/0434/7514/0761/files/elementary_probability_theory.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/gurilararivetanoxenisid.pdf
    • https://static.usrfiles.com/ugd/7198c1_047080f2ccf04dd8ab0e64b55c6b6c24.pdf
    • https://static.usrfiles.com/ugd/f34323_074c249df8b7460aa0ad2d9c635ce639.pdf
    • https://static.usrfiles.com/ugd/8ff694_1bd41f50d0944578adc1445d770b3016.pdf
    • https://static.usrfiles.com/ugd/bd7df1_5daec7ee92b54a3e99c812b64a070932.pdf
    • https://static.usrfiles.com/ugd/362633_a60a15ebc2b144dc8c67103e7fb661e8.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_off00004cf7.bin
e4fa6f562f5c39989d5322b2d3df331a1e5a9418e93a141f7314cd7c543e8fed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CF7 5420 bytes
font_01_sfnt_off00005f77.bin
d7d38bad466ef4f9de1879d960d235cb0cd3900718ef1b95347f2ced304c1f58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F77 9688 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.