Malicious PDF — malware analysis report

Static analysis result for SHA-256 acefcfd5cea6241e…

MALICIOUS

PDF

61.5 KB Created: 2020-09-04 23:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a8d12310d66fabf32c1eb1b941474ab SHA-1: 02b1d1b0fd9b837e55b0c19f50a0826f6fa9b4d4 SHA-256: acefcfd5cea6241ea37c14a2bc33ab10d1403b4ac5100a1482c2b55dbd4e06ce
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The primary malicious IOC is the redirector URL.

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.link/wix?keyword=sales+and+marketing+plan+template+ppt
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/the_fire_within_me_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/3792/5269/files/vapovoxofelemorop.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5602/files/anti_allergic_drugs_classification.pdf
    • https://static.usrfiles.com/ugd/b98abb_cdebd8ef98494588a431ef244d2cdbb3.pdf
    • https://static.usrfiles.com/ugd/9c43ec_92b2bd9a0d474c218c9e8a5190dd1935.pdf
    • https://static.usrfiles.com/ugd/f1780b_05d3d44305b54a889d122fd5eea038c7.pdf
    • https://static.usrfiles.com/ugd/b48b60_f366949b93e847568469789392f2b150.pdf
    • https://static.usrfiles.com/ugd/739437_4dad06664390475a921f37440bc9ebe9.pdf
    • https://cdn.shopify.com/s/files/1/0431/1184/1949/files/wipuludadedijigifed.pdf
    • https://cdn.shopify.com/s/files/1/0437/1703/4134/files/pibulimejekulugelupas.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/74881534116.pdf
    • https://cdn.shopify.com/s/files/1/0431/8714/2818/files/42113320689.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_off0000acb9.bin
6ac36c549db28461e3ed7ea8d9cb57ae73a65c834b1ac076d99316ac52ff8837		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACB9 5444 bytes
font_01_sfnt_off0000bf24.bin
1e0b9ddd09e89a6ba6c8b5016d46d537676ab248f2f8ab75d845c37e564203cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF24 13132 bytes

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