Malicious PDF — malware analysis report

Static analysis result for SHA-256 37e6f398f17a1b1b…

MALICIOUS

PDF

36.4 KB Created: 2020-09-01 03:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 242d03083856c1363e1a236437140528 SHA-1: 4e54c0233a95a7e99d3ff0ed05eb811248aaf06e SHA-256: 37e6f398f17a1b1b38ae2fcdfd0190127eda71733a34b11ef8ed34bbf5afcb12
162 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'Jaspersoft report server superuser login' and includes the malicious URL. The presence of numerous embedded links, many pointing to Shopify-hosted PDFs, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests this PDF may be part of a multi-stage attack where the user is instructed to download an archive, likely containing further malicious content.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.com/wix?keyword=jaspersoft+report+server+superuser+login
    • https://cdn.shopify.com/s/files/1/0438/9067/1771/files/gomuxuwakor.pdf
    • https://cdn.shopify.com/s/files/1/0433/8905/9228/files/90130147305.pdf
    • https://cdn.shopify.com/s/files/1/0433/8401/2956/files/riredowaliribenapibofujeb.pdf
    • https://cdn.shopify.com/s/files/1/0440/0336/0926/files/plantilla_agenda_2020_gratis.pdf
    • https://static.usrfiles.com/ugd/a48928_a154ef05c4ba4256b429f4bf1d1e027f.pdf
    • https://static.usrfiles.com/ugd/80bfa9_689c1e1f7bf84f3ab373a47342eb3735.pdf
    • https://static.usrfiles.com/ugd/4c76bf_b23a21438f2640a594d2f6d2ca87ef5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f601a48014ad4ce6a86afe8b1550cd5c.pdf
    • https://static.usrfiles.com/ugd/e2c250_70169d6ddf7f4756b7eb28b78440a8c4.pdf
    • https://static.usrfiles.com/ugd/b88e3d_735bdb1457374456b1fa184015c6a454.pdf
    • https://static.usrfiles.com/ugd/1a89c8_6b90880c7dec47efaa120ffc05b9152e.pdf
    • https://static.usrfiles.com/ugd/72b0e7_ae98433b18584d9281f7f2994d28130b.pdf
    • https://static.usrfiles.com/ugd/b8c837_0019bec7fe5d4706b2cf7941c50487ad.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1fac94d232c474b8aa36e3b150783ab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004547.bin
4b650f89ff25aeef31dcf809ce9a0dd32a562d3cf09a99494b72ccde05623667
pdf-font-stream PDF embedded font (sfnt) at offset 0x4547 5000 bytes
font_01_sfnt_off00005660.bin
b7debe611ba68a81950495290a5923ebe419750ed8e87a6232d4437d4dc59bc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5660 9392 bytes
font_02_sfnt_off00007657.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7657 4324 bytes