Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3d3a818210cda5…

MALICIOUS

PDF

39.4 KB Created: 2020-09-04 19:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0434a7821b0c2a67008a61882b0bc7b SHA-1: db28530f99d59b41e607f355afdc85de37061e60 SHA-256: ea3d3a818210cda53262bfe6fa65bdd84309bcc8a732cde73a40971ee7563a54
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is https://ttraff.link/wix?keyword=ionic+action+sheet+android+style, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and references to other PDF files, suggesting a link farm or redirection tactic. The ML classifier also strongly indicated maliciousness.

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.link/wix?keyword=ionic+action+sheet+android+style
    • https://static.usrfiles.com/ugd/1b8612_f2ecb53d7d9844c5b5e9517840ecaa20.pdf
    • https://static.usrfiles.com/ugd/2a2e94_79fa4d66d3c643a794919ddbe7c6ad1a.pdf
    • https://static.usrfiles.com/ugd/fa6f14_decde2d75a52491fa5a9c82dc138a088.pdf
    • https://static.usrfiles.com/ugd/3254bf_71f0ae05db02474c90baaff906f1c825.pdf
    • https://static.usrfiles.com/ugd/436160_72682ade65bc46b993c20abaa860d2f5.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/index_card_template_word_2013.pdf
    • https://cdn.shopify.com/s/files/1/0430/2589/1479/files/21297712937.pdf
    • https://static.usrfiles.com/ugd/bc0d1e_e18c0c9430754629afcbfc264a9f75a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_895bc1339dad4deebd748217b346c316.pdf
    • https://static.usrfiles.com/ugd/b8c837_849ea72b66b94d2296ea6375bc26e85b.pdf
    • https://static.usrfiles.com/ugd/733c1f_b8234755aa3c4bf49838f1994093acc3.pdf
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/systematic_theology_by_john_frame.pdf
    • https://cdn.shopify.com/s/files/1/0433/9099/2549/files/zubavelekomajenagu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0255/2735/files/change_your_words_change_your_life_joyce_meyer_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/70935766598.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_off00005cb8.bin
eed2707c3520ae6c843585a2c4ffa06cb8ca15d7e89836461794f8293455292b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB8 5068 bytes
font_01_sfnt_off00006df2.bin
bc337b4edc2e81ad1d027ae1d2cf6764d7d885403ec1a295a16eea3b0d097783		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF2 10088 bytes

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