Malicious PDF — malware analysis report

Static analysis result for SHA-256 0488740ed69eadf7…

MALICIOUS

PDF

39.2 KB Created: 2020-09-12 00:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 359053e4c17e3a549929fd26887eb2c2 SHA-1: b8ef80f5ea89b592f7e93f15b4f4ada811949dee SHA-256: 0488740ed69eadf7102d5ba5d9c58a00bf7685fadcf96b95ff3e73f1f4962d27
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. It also exhibits characteristics of a PDF link farm, with numerous external links, many of which are benign Shopify URLs. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure users to potentially 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.club/pify?keyword=psp+game+god+of+war+4
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_aafbd17cb98245e3a07b59be7b774e56.pdf
    • https://static.usrfiles.com/ugd/72ed28_3aec8e2f3fdf4785bc34f33be28589d8.pdf
    • https://static.usrfiles.com/ugd/9d66c7_b1b2bcd384ef4b75bee679398e9f27e8.pdf
    • https://cdn.shopify.com/s/files/1/0429/0609/1673/files/76762213988.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2694/files/pdf_annotation_free_android.pdf
    • https://cdn.shopify.com/s/files/1/0434/7697/5768/files/farosudelazak.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2313/files/38143833944.pdf
    • https://cdn.shopify.com/s/files/1/0431/4329/9234/files/21178734291.pdf
    • https://cdn.shopify.com/s/files/1/0434/3418/0769/files/gakaxeg.pdf
    • https://cdn.shopify.com/s/files/1/0461/9691/6377/files/49653430520.pdf
    • https://cdn.shopify.com/s/files/1/0429/2214/8003/files/migezebug.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_off00005a30.bin
2bc1f1498f15c60f3e8b3cc4dd9110a9c015f8caba4517eb62b5c9558ca021a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A30 5512 bytes
font_01_sfnt_off00006cf4.bin
0ace51417210470806ea963089e981b4fbaef5f85659096e97240a41c76d9f85
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF4 10376 bytes