Malicious PDF — malware analysis report

Static analysis result for SHA-256 634531999a444b55…

MALICIOUS

PDF

39.0 KB Created: 2020-08-14 20:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0cff82c05801a12c3387904cc4a86b4 SHA-1: 9d0e086b5283653ce22438aada1dafc8ea0f75a2 SHA-256: 634531999a444b55c56a755d78a5d6cb6ba95d0149b843c43a452d09eaee3e33
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. The document body text and embedded links are designed to appear as "meditation piano sheet music pdf" to deceive users into clicking the malicious URL. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL confirms the intent to lead users to harmful content.

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/pify?keyword=meditation+piano+sheet+music+pdf
    • http://files.jamesstockartwork.com/uploads/1/3/0/7/130775111/bosuw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2924/0727/files/dusubamixapowejuze.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/53776498747.pdf
    • https://cdn.shopify.com/s/files/1/0432/9370/4350/files/free_calling_app_for_android_with_wifi.pdf
    • https://cdn.shopify.com/s/files/1/0440/7079/7462/files/jumebelawu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1119/3501/files/movie_genres.pdf
    • https://cdn.shopify.com/s/files/1/0437/3594/1274/files/rawexobowu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2891/4074/files/juwuvozabepaxolasupowof.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87277754858.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/79214809987.pdf
    • https://cdn.shopify.com/s/files/1/0431/2943/8370/files/carbohidratos_de_absorcion_lenta.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000044de.bin
70214db0c64077a9d9ee5ad53dd8f65d0369eac0d44dcb6f08aa7e0d5d9838c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x44DE 5272 bytes
font_01_sfnt_off000056b0.bin
bbb1387bb1da876592de017a1a0c72fa4bc72442387e943b44615f2cc0bfdf27
pdf-font-stream PDF embedded font (sfnt) at offset 0x56B0 10204 bytes
font_02_sfnt_off000079da.bin
5b7414894cffcee7154d64de4bc26f26f13281da6ae589522af7d735fa3d0211
pdf-font-stream PDF embedded font (sfnt) at offset 0x79DA 16188 bytes