Malicious PDF — malware analysis report

Static analysis result for SHA-256 134d7ff5b5f63351…

MALICIOUS

PDF

41.8 KB Created: 2020-08-30 01:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2efdde67a7c788082b3ae214d60b4075 SHA-1: fc25920f5e45941d2947c5d77148e9f190a854b6 SHA-256: 134d7ff5b5f6335169c833788c2931519a85407090f8d0db73f556c7ca708840
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes a URL that appears to be the primary lure.

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.me/wix?keyword=janapada+geethalu+naa+songs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/93789206116.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/87646060665.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/badegogobalejobujivatone.pdf
    • https://cdn.shopify.com/s/files/1/0434/0491/8941/files/vigepukuroramuxariba.pdf
    • https://cdn.shopify.com/s/files/1/0435/1036/6362/files/zijefujosomiposi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9060/8285/files/google_translate_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2480/files/xisibapeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/6243/5739/files/timeline_resume_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0445/6900/2143/files/84193530981.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/2900/3416/files/mexura.pdf
    • https://cdn.shopify.com/s/files/1/0434/7097/9237/files/65223209607.pdf
    • https://cdn.shopify.com/s/files/1/0439/8628/8798/files/11947464918.pdf
    • https://cdn.shopify.com/s/files/1/0435/2737/2964/files/how_to_install_i3_gaps.pdf
    • https://cdn.shopify.com/s/files/1/0434/5040/0920/files/5459730882.pdf
    • https://cdn.shopify.com/s/files/1/0432/5762/6792/files/22155499419.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_off00005b43.bin
e189feff5bf8b8205d67cd1a1b20ec6415c34e36cf7c39a9f9d03078a8aa6028
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B43 5112 bytes
font_01_sfnt_off00006c9d.bin
cb756a2c58f4fd93551ffc1e1f1caeedeaf37683e0a3ebc47b7885e4d4e11b1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9D 14496 bytes