Malicious PDF — malware analysis report

Static analysis result for SHA-256 762cb663fa014f27…

MALICIOUS

PDF

37.0 KB Created: 2020-08-30 16:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e2181f8cd06161d26617d939c191cf4 SHA-1: d6d63412a5e802d37049abfd152fd8057b6c3560 SHA-256: 762cb663fa014f2707c11572318bcb7cfde209a167220bd36878dbec6af71800
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.cc/wix?keyword=expresion+y+apreciacion+artistica+juan+acha+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into visiting a malicious site. The presence of numerous other PDF links points to a link farm strategy, likely for SEO manipulation or to host further malicious 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/wix?keyword=expresion+y+apreciacion+artistica+juan+acha+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9382/7485/files/stihl_ms290_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/vevedabi.pdf
    • https://cdn.shopify.com/s/files/1/0437/0857/9993/files/best_answers_for_weaknesses_in_job_interview.pdf
    • https://static.usrfiles.com/ugd/b8c837_17a860dedf444e51891f04637412621d.pdf
    • https://static.usrfiles.com/ugd/b8c837_495b255cf0bb4d7cac6070c91c4eddff.pdf
    • https://static.usrfiles.com/ugd/f96b02_72c2a96a55b54ab6915cf3c2bb5a05a8.pdf
    • https://static.usrfiles.com/ugd/b8c837_278e3a57eae84c0eab8999e0be6f1c5e.pdf
    • https://static.usrfiles.com/ugd/455f95_71cee377316b46619e1b9d6ae370a7b0.pdf
    • https://static.usrfiles.com/ugd/b8c837_20ffe5153bf840dda99856ec899bec2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_0dc2bb375e19499ba24623f6837afb66.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f2ba7c7dd6148fb955195fcd3266268.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_190a83eff13f4be399a53999a20cb7ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_423207164244401794b466760c6e51b7.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_off00005021.bin
5c4e802c66458a944105b8fb303735a11942a75a987e11d28989e2e506dc5713
pdf-font-stream PDF embedded font (sfnt) at offset 0x5021 5412 bytes
font_01_sfnt_off00006296.bin
22fcd8fa8cf2e15b970675cc986b6671de226d3f15b8f1c52d5c7528451e6725
pdf-font-stream PDF embedded font (sfnt) at offset 0x6296 10652 bytes