Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73c4fda5b5dbdc8…

MALICIOUS

PDF

49.7 KB Created: 2020-10-07 02:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e40a9d85226fc321bcce9108e7f55914 SHA-1: 4d50ed11aac05fecc7a7c9216b83dcbc0a9b03a4 SHA-256: d73c4fda5b5dbdc8cccb91a807b52f33d5101a1477a9c9452435a0ef405cc694
182 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to a download lure for 'easeus data recovery wizard'. The document body also contains this URL and text related to downloading software. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, suggesting a broader campaign to distribute malicious content. The primary malicious IOC is the redirector URL used to funnel victims to the download.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/pify?keyword=download+easeus+data+recovery+wizard+8.8+setup+with+license+code
    • http://rajemofas.herbparkeronstage.com/uploads/1/3/2/7/132740649/rosikugadok.pdf
    • https://uploads.strikinglycdn.com/files/64f8a657-3ca3-4ab5-b87b-51512d47ac6e/29367972608.pdf
    • https://uploads.strikinglycdn.com/files/27bed94f-d6b1-40de-bd93-3ebb9bd6fe5f/putiwi.pdf
    • https://uploads.strikinglycdn.com/files/d766e6f9-a117-412c-a8bc-234b64be7a7a/zaxoriporetarofuvak.pdf
    • https://uploads.strikinglycdn.com/files/9bac7a24-d9bd-4210-a1c6-5944f8352329/xewulemikegolekifopa.pdf
    • https://cdn.shopify.com/s/files/1/0440/1663/1973/files/wanopuxuzuzurujigal.pdf
    • https://cdn.shopify.com/s/files/1/0482/8076/4571/files/davisavexivixiwukotakejug.pdf
    • https://uploads.strikinglycdn.com/files/a9b7764e-f9ec-45b7-b3c9-24f389a81879/29418689184.pdf
    • https://uploads.strikinglycdn.com/files/329be5db-d3cb-4e93-a624-190665ec1b81/13947372492.pdf
    • https://uploads.strikinglycdn.com/files/1a4d66d8-52e9-444a-8096-bd5baf46ae6d/76024428927.pdf
    • https://uploads.strikinglycdn.com/files/62c6f8c3-266d-4fa0-ad09-67a1af7e4321/wobotepujida.pdf
    • https://uploads.strikinglycdn.com/files/65f31b61-ae34-47ab-93d0-d5afd6432676/piputuvavurakevi.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_off00006ab1.bin
5921ef24f97b76d35aa1dce7dd78e59e7fda394d50af9492d41c186241308622
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB1 3688 bytes
font_01_sfnt_off000077b7.bin
55a012d8a66720bee9260a1f96aee3b417a4e91464052a118731660df397f522
pdf-font-stream PDF embedded font (sfnt) at offset 0x77B7 5692 bytes
font_02_sfnt_off00008b44.bin
5aa043bd85634b2c6bfb53f6f5e5efccd77fba8cac656c3d8b29aadd59be2d85
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B44 14560 bytes