Malicious PDF — malware analysis report

Static analysis result for SHA-256 8948aa93268e4d03…

MALICIOUS

PDF

50.0 KB Created: 2020-09-01 02:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ead2ddbbf5981724c5587c3186ca9445 SHA-1: dd5d66ed44d6a3e977dd35ecf6071cbfe94d85c7 SHA-256: 8948aa93268e4d03f65aca8ad706c264cd59b0be7a35ebe40ea276725454f3e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=binaural+meditation+music+free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to a Shopify domain. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking PDF links, suggesting a lure to disguise the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=binaural+meditation+music+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/82687132659.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/zemokomu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/jimulufup.pdf
    • https://cdn.shopify.com/s/files/1/0430/9765/3397/files/functional_group_in_organic_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0428/5808/6559/files/ubuntu_to_thumb_drive.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8372/files/13083504384.pdf
    • https://cdn.shopify.com/s/files/1/0434/6901/3158/files/megaman_zero_3.pdf
    • https://cdn.shopify.com/s/files/1/0432/0496/8603/files/56451657083.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/2581582401.pdf
    • https://static.usrfiles.com/ugd/b8c837_e340b4e0341b4c08a2f918c0e687e228.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_aa3503c9388942cdbd1f0672effd64a2.pdf
    • https://static.usrfiles.com/ugd/b4a829_de6d6be2a69a4584b103c5d69aad4e35.pdf
    • https://static.usrfiles.com/ugd/d94ae5_09a9322104ea445694337edba9bebc66.pdf
    • https://static.usrfiles.com/ugd/c068f8_1fa06bb4bf7d41ac8968fe4c23a42c00.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008627.bin
3834679e4429895183d2a8a7efa01bab270c57806ccc322158b470c74c86f246
pdf-font-stream PDF embedded font (sfnt) at offset 0x8627 5216 bytes
font_01_sfnt_off000097cc.bin
c396b94629f3ce7257a49bf5a71da323a9ffc568dfd8b86e9044649b7bc38f85
pdf-font-stream PDF embedded font (sfnt) at offset 0x97CC 10344 bytes