Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e636b1c789c1f6…

MALICIOUS

PDF

40.0 KB Created: 2020-09-02 05:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aefc6f5bb08687a12f88c67f971fa899 SHA-1: 56d19625c575d6b0eae86f800397d173417aa206 SHA-256: 17e636b1c789c1f6be8974bf8d3c003c78061109348f8cac27c6a4bc10cc06fd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the presence of a malicious redirector suggests an attempt to lure users to a compromised site, likely for further exploitation or phishing.

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.com/wix?keyword=bike+games++pagalworld.+com
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/pujogabodo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9087/0423/files/ielts_answer_sheet_speaking.pdf
    • https://cdn.shopify.com/s/files/1/0443/6020/4444/files/46317277383.pdf
    • https://cdn.shopify.com/s/files/1/0451/8638/4023/files/hospital_brochure_design.pdf
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/sowujiwiguzagitifuga.pdf
    • https://cdn.shopify.com/s/files/1/0429/4361/1036/files/94881964024.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/plies_shawty_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0436/2990/4032/files/50088186866.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/38050102077.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/datofugilasififuko.pdf
    • https://cdn.shopify.com/s/files/1/0436/7735/2089/files/nobapa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3214/0186/files/marriage_biodata_format_for_boy_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/4945/9605/files/86754252500.pdf
    • https://cdn.shopify.com/s/files/1/0465/1673/2054/files/essential_grammar_in_use_fourth_edit.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/xowusoj.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_off00005e05.bin
8d138cc5f8db2681eaf298a02a89febc9827a2431e4c1cc0316de020e7c746ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E05 5632 bytes
font_01_sfnt_off00007131.bin
9cf5798e65a636eb5b4b1ac3d352f9108bddbd99f47562abbfd41037e28bca4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7131 9960 bytes