Malicious PDF — malware analysis report

Static analysis result for SHA-256 6688c292f7ff989b…

MALICIOUS

PDF

40.6 KB Created: 2020-08-20 19:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7482f7fca3f618e86f9253e87f4b3fe9 SHA-1: 17cb1b197c3c0be4e6f69125f6725e2b48876076 SHA-256: 6688c292f7ff989b7666e87778e52eb43c885c3ec6657bb715bf5f8e7a30749a
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body and embedded links suggest a lure related to embedding PDFs into Excel, likely to trick users into downloading a malicious payload. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=embed+pdf+into+excel+spreadsheet
    • http://files.nikkileahdesigns.com/uploads/1/3/0/7/130776141/zezovafu.pdf
    • http://files.myediblechaos.com/uploads/1/3/1/4/131407315/melazimevavew_worogitelute.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/nokizox.pdf
    • https://cdn.shopify.com/s/files/1/0451/9349/4677/files/biodata_form_file_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8114/6280/files/fifekegesilazagipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4577/2698/files/financial_statement_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/4048/0164/files/39681093501.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/cellulose_aerogel.pdf
    • https://cdn.shopify.com/s/files/1/0443/4483/6252/files/daposuzitumobunawawogok.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6201/files/jisuzenivax.pdf
    • https://cdn.shopify.com/s/files/1/0439/7599/9646/files/nitros_oxide_cracker.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdf
    • https://cdn.shopify.com/s/files/1/0434/9837/3285/files/safari_crash_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/38721125520.pdf
    • https://cdn.shopify.com/s/files/1/0432/3737/6157/files/fibenunenafajijufon.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_off00006014.bin
1ef2a9896724a0f492f56a5a0e27eb7bb95af2cc4c782cbf16fb32021645faf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6014 5560 bytes
font_01_sfnt_off000072cd.bin
9d9dc2bab894d0a06655184f64c94c16803a4157c15046593bccd6b41cb6193a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CD 10196 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.