Malicious PDF — malware analysis report

Static analysis result for SHA-256 9feb6b2af1e658d8…

MALICIOUS

PDF

39.7 KB Created: 2020-08-30 06:14:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04798d4099d08a35ccaa64f80e785e6b SHA-1: 5472a0acb6a8bef1bf64d51d82e91e4e13285e5a SHA-256: 9feb6b2af1e658d835199ca38b4aa8426f8183d95b5bd645751a52d71f2c5265
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, with one identified as a malicious redirector. This suggests the document is designed to lure users to malicious sites. The ML classifier also strongly indicated maliciousness. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=english+working+model
    • https://static.usrfiles.com/ugd/b8c837_86fd3b4a1b0e47df8cd87c2ef50731de.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed34aca71a40419b9ec8ee211011c7d6.pdf
    • https://static.usrfiles.com/ugd/7ff653_e45e6575e33b4f2d9cd061651f3c66c7.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/tewexifozarafodufel.pdf
    • https://static.usrfiles.com/ugd/b8c837_3243ba198d514fe3aa9ffd07cfddc361.pdf
    • https://static.usrfiles.com/ugd/b8c837_3de774401a19459cab34877a8135017a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b5cb405eec374da292893a431cdc0498.pdf
    • https://cdn.shopify.com/s/files/1/0438/7612/2792/files/76353978092.pdf
    • https://cdn.shopify.com/s/files/1/0439/1357/6603/files/important_dates_in_history_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/4088/9240/files/sigaguwusakazemodapizoli.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_off00005ed1.bin
850d6470e73052b62587252ee147131ba3c195175c2eedd708f74ca879ed1174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED1 5140 bytes
font_01_sfnt_off00007032.bin
6d1c9102743d3486092fdef4721996f45cc04efdf1c921b4155f0f7f0304faf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7032 10040 bytes

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