Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbfb46a725bf6cd…

MALICIOUS

PDF

43.7 KB Created: 2020-08-14 09:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 952c3abf298f88900a8836f2e5a99351 SHA-1: 438cc03e762c3955dd2f80cfa58f5fd2883021c3 SHA-256: 0bbfb46a725bf6cd1f9b64847f6880eca8252b061b117781f9b039f5e483578f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains a lure to install a browser extension or update, a common social-engineering tactic. It also hosts a large number of external PDF links, with one pointing to known malicious redirector infrastructure. The ML classifier strongly indicates maliciousness, and the embedded URL suggests a potential download or redirection to a malicious site.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.ru/pify?keyword=chess+engine++mac
    • http://files.davidlevitt.net/uploads/1/3/1/8/131856234/2144485.pdf
    • http://files.cmcpressurewashers.com/uploads/1/3/1/1/131163740/58e1f029f.pdf
    • http://files.alifeworthliving2.org/uploads/1/3/0/8/130874318/lenalaw-fowez-legojumafixixin-tunotababivofen.pdf
    • http://files.livefreeandfarm.com/uploads/1/3/1/4/131406544/2adfb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/tawuregulanusisujagaxo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5232/files/bufubogadajuwom.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/mournings_end_part_1.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/romafeka.pdf
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/familia_caricaceae.pdf
    • https://cdn.shopify.com/s/files/1/0440/4504/1814/files/bible_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/3897/3857/files/career_wise_bursary_application_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/1157/9809/files/august_2020_calendar_kalnirnay_marathi_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/fukexagapejonuloxexo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/55915686742.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/60228606330.pdf
    • https://cdn.shopify.com/s/files/1/0435/0964/5478/files/frozen_shoulder_stretching_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/7920/3992/files/pepuluxegajak.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_off00006dcf.bin
e833c4a1a691eb1ce9e3348de00f14286ea29a6689ea6c637d07bdcd3b1c4ae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCF 4988 bytes
font_01_sfnt_off00007ea0.bin
9ddcc7fd14d0bc157cd01150ad7bfeee9d318619162c7365e484766f058d39c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA0 10300 bytes

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