Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3e70daacb9836f…

MALICIOUS

PDF

42.5 KB Created: 2020-08-15 14:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6616b169e7acbcb95ce9bfd66b8ef56 SHA-1: 6bf94c0fd9796082922de9243dbd7d6aa7ef158d SHA-256: bb3e70daacb9836f95f817c0f520f4540c6ed22662afd4a0a1e624bf60777235
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a download button, aiming to lure users to a malicious URL. The document body contains garbled text but includes the target URL. The PDF also exhibits characteristics of a link farm, with numerous external links, some of which are benign Shopify URLs, but the primary redirector is suspicious.

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/wb?keyword=html%20to%20pdf%20java%20code%20free
    • http://files.sanctuaries.org/uploads/1/3/1/1/131163683/mawibefipi-zepup-tipobep.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9762/files/gopig.pdf
    • https://cdn.shopify.com/s/files/1/0430/8657/7828/files/25952869103.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7256/files/55674254067.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/gitalafefulomogovoxudilop.pdf
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/tulerijolerifojaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/9956/9832/files/wurajavetaredarobabiretu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2352/4259/files/dr_berg_the_new_body_type_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/refojimoxatobujo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7727/8627/files/75505419293.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/50979505159.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_off0000686e.bin
839487dc1ad0a3e2f30d5aa2c76529aa084d0bd26e800e5ac1f723bdbd4477f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686E 5220 bytes
font_01_sfnt_off00007a27.bin
bb83e833642abd036a4dea5b4a254b08e02c42e02efd40eecb7d5999fcd51248		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A27 10472 bytes

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