Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab6cb3f0a6d089a…

MALICIOUS

PDF

72.6 KB Created: 2020-07-31 23:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c5c8b7bcf9f2993e95926634c7aac1b SHA-1: 4ab9c6f1e184f5e3263f8848de9b00e780cc03a5 SHA-256: 5ab6cb3f0a6d089a96999bb39d867680b5a0c854e8e4ea815841694f8992187b
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF also exhibits characteristics of a link farm, with numerous embedded links to external PDFs. The ML classifier strongly indicated maliciousness, and the embedded URL is a key indicator of a phishing or redirection attempt.

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=basic+sql+queries
    • http://files.strayashop.com/uploads/1/3/1/3/131380045/fdf32ee49ef5f.pdf
    • http://files.makemoneywkyn.cash/uploads/1/3/1/1/131164250/9486522.pdf
    • http://files.partyrentaleqpt.org/uploads/1/3/1/0/131070459/a717f2cfa85ca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5865/8456/files/76126541188.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/48702210477.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5126/files/71169189550.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/20416539025.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/88981123162.pdf
    • https://cdn.shopify.com/s/files/1/0433/0392/7973/files/xegojukova.pdf
    • https://cdn.shopify.com/s/files/1/0429/3292/8671/files/35484012751.pdf
    • https://cdn.shopify.com/s/files/1/0433/5167/0943/files/22739432604.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/mofekikapogogigefomitaxos.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/xajevedukisenamezuga.pdf
    • https://cdn.shopify.com/s/files/1/0432/9055/8620/files/6560687617.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_off0000d3e1.bin
5e7373f36a8d2b5cf7948af07e1319861d7fd05103726d7c712662ffd1b94d98
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E1 4968 bytes
font_01_sfnt_off0000e4d6.bin
7b65083d0a86b312ae56cd86fd86e383f92a88d976650e6e17e5e8cbd8754adb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D6 15468 bytes