Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae690e8bbdb93d7…

MALICIOUS

PDF

52.6 KB Created: 2020-08-24 23:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e1d81f93e698f794887bb7fcd8821a9 SHA-1: 3875a4d14ad158db38e0f3bbcb7e0392c6cd55df SHA-256: 3ae690e8bbdb93d72b7454b5e075225f9baefa78d5e55d614054fd026c7aab0a
128 Risk Score

Malware Insights

MITRE ATT&CK
T1200 Hardware Add-in T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a download button, aiming to lure users to a malicious site. The PDF also hosts a large number of links, many pointing to benign Shopify URLs, but the critical finding is the redirector. The document body contains garbled text but includes the target URL and a benign-looking PDF link, suggesting a deceptive lure.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=jdk+1.+8++for+linux
    • http://susezev.bethanybogacki.com/uploads/1/3/1/4/131406801/1164551.pdf
    • http://files.cubandcuppy.com/uploads/1/3/2/6/132695829/a93690f1f9.pdf
    • http://texin.marksturgess.org/uploads/1/3/1/4/131407377/704529.pdf
    • http://files.cubandcuppy.com/uploads/1/3/2/6/
    • https://cdn.shopify.com/s/files/1/0429/9004/3285/files/alzheimer_s_disease_mechanism.pdf
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/minecraft_1._8._9_servers.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90209356055.pdf
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/45998073615.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/management_of_cardiac_arrhythmias.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fokukivovasogu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/zimonujadizezasim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19227598733.pdf
    • https://cdn.shopify.com/s/files/1/0440/6624/2710/files/31222327255.pdf
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/zuzotoronikilebijasi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1626/files/bvi_company_law.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/periodic_table_with_oxidation_numbers.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_off00008946.bin
ab5c6dcdf007d5f042585e31fe7e1fe8a6a791b1f88dc6e85425f80c18a4c9c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x8946 4912 bytes
font_01_sfnt_off00009a1e.bin
c5acfba8a359bb0e12d4abe8e2c23715b0b97a969ee9ec9762af0482124e69e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A1E 13236 bytes