Malicious PDF — malware analysis report

Static analysis result for SHA-256 16bb08b94f12f73d…

MALICIOUS

PDF

43.3 KB Created: 2020-08-20 04:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cde68c8ed44e87fea56c9b02804a470 SHA-1: 14fc2bf94ddf1525d155faf0e9a13475c2d5f7e2 SHA-256: 16bb08b94f12f73d4aa5a47375043df3505c2762b5a2d81643a504be72445f2b
154 Risk Score

Malware Insights

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

This PDF file contains a link farm and a critical redirector link pointing to malicious infrastructure. The embedded content, though obfuscated, includes the URL 'https://ttraff.com/pify?keyword=android+game+hacks+2019', suggesting a lure to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/pify?keyword=android+game+hacks+2019
    • http://files.livingtrustma.com/uploads/1/3/1/8/131872178/xubukodubar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4937/7174/files/30992894768.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/90075974610.pdf
    • https://cdn.shopify.com/s/files/1/0436/0906/3586/files/joniwaxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0629/5201/files/koviwowegipi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/giant_mole_guide_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/90326427944.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6561/files/moruwerekemutusop.pdf
    • https://cdn.shopify.com/s/files/1/0440/1247/0422/files/shatpath_brahman.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_off000069d7.bin
6401642166cccd46e1f0c53a8918055ad8e64404f64c6386cb67be23a4e1ace6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D7 5856 bytes
font_01_sfnt_off00007d9d.bin
930de1025ff90515f7c4f1dbb5535b5fd97a2e75949428ef757cdffb3f852299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D9D 10420 bytes

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