Malicious PDF — malware analysis report

Static analysis result for SHA-256 546bf6e117cad3d7…

MALICIOUS

PDF

40.0 KB Created: 2020-08-07 22:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 371e884e5cb003169c0364c6868b8ab4 SHA-1: 36ccc0f420d7af82a57768599cc5e0782c30dabb SHA-256: 546bf6e117cad3d76ef66316ebbc67398f9f1aa6b22e98055236991be87d80b2
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating an attempt to lure users to malicious content. The presence of a 'download button' heuristic further supports this attack pattern. The document body, though heavily obfuscated, contains the malicious redirector URL and several other potentially malicious PDF links, suggesting a delivery mechanism for further payloads.

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.com/pify?keyword=anatomy+and+physiology+coloring+workbook+pdf+chapter+5
    • http://files.zevkali.com/uploads/1/3/1/4/131454355/eb8fb6dd15b0b6.pdf
    • http://files.xonoil.com/uploads/1/3/1/4/131438018/878331.pdf
    • http://fifasazo.jessicacontrera.com/uploads/1/3/1/0/131070581/1112499.pdf
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/24518068883.pdf
    • https://cdn.shopify.com/s/files/1/0431/6885/8280/files/89467272967.pdf
    • https://cdn.shopify.com/s/files/1/0430/0842/6147/files/lezipunekekegoxavenagixem.pdf
    • https://cdn.shopify.com/s/files/1/0429/3551/7337/files/66039460490.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/56570243124.pdf
    • https://cdn.shopify.com/s/files/1/0428/9875/1641/files/exception_hierarchy_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8854/files/laxobujarutasikegu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6725/1617/files/16029338785.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/popukapuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/puxazuvexebuvog.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/volubaviwokivarerufew.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/fugamovawexodakoxalokabem.pdf
    • https://cdn.shopify.com/s/files/1/0432/0854/0324/files/xefejizakovaf.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_off00005b9b.bin
bdb4de2afff5792f2ceeb7664101c63d5807828d8da7549837b91a673a2d1ce1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9B 6080 bytes
font_01_sfnt_off00007040.bin
a2e3cf224c020588e0d3eb39aa4a66660e1a7a813d5c5b0bb2f437739fd80874
pdf-font-stream PDF embedded font (sfnt) at offset 0x7040 10092 bytes