Malicious PDF — malware analysis report

Static analysis result for SHA-256 0695028d5ecbf8eb…

MALICIOUS

PDF

60.7 KB Created: 2020-08-29 03:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46ca2e8aadb14e87f13170147302d8e6 SHA-1: ffb74aa608bba1f25b688f4284c8ed79ac65c4b6 SHA-256: 0695028d5ecbf8eb74eeaf6b5b3927a6e754c7c3100338481c9a5f4a04431e17
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'script writing format pdf' and a URL that appears to be part of a link farm. This suggests a phishing or scam campaign designed to redirect users to malicious infrastructure.

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=script+writing+format+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/nugitixowizexilapivo.pdf
    • https://cdn.shopify.com/s/files/1/0463/1009/7053/files/vadek.pdf
    • https://cdn.shopify.com/s/files/1/0431/0594/3701/files/biology_ppt_templates.pdf
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/madotipewe.pdf
    • https://cdn.shopify.com/s/files/1/0427/8799/5807/files/romanticism_paintings.pdf
    • https://cdn.shopify.com/s/files/1/0431/9690/7684/files/boat_browser_pro_8._7._4_apk.pdf
    • https://cdn.shopify.com/s/files/1/0436/7620/5209/files/training_manual_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/5719/1843/files/28829715871.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9702/files/kepewozukoxolezuxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0634/4868/files/analytical_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/1683/0632/files/fairy_fountain_theme_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/la_poC3A9sie_didactique.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_off0000ae7e.bin
7f21eed30c047d75c0cb3e8525c8d3dde2b460b02e853d556b00abfcac5eabfb
pdf-font-stream PDF embedded font (sfnt) at offset 0xAE7E 5460 bytes
font_01_sfnt_off0000c101.bin
8da0fed346d078bb4f90fc1efeca35f524e069532a3535e3fd76c3fd641434f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xC101 10892 bytes