Malicious PDF — malware analysis report

Static analysis result for SHA-256 76fde60508ad6325…

MALICIOUS

PDF

104.2 KB Created: 2020-09-08 21:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19867c6ea612394c59a6b77f44ce6f4e SHA-1: 1e3b45fcf7f99670f45b165bedf91d162e1a8e66 SHA-256: 76fde60508ad6325bc4c03ccb062e915cc7830f47b3963992a37476c25ed6ce1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is presented within the document body, disguised as a game guide, indicating a lure to a malicious site. The PDF also contains a large number of external links, many of which are to Shopify, suggesting a link farm or SEO manipulation tactic to distribute malicious content.

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.ru/wix?keyword=the+binding+of+isaac+afterbirth+item+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0352/6820/files/25101407688.pdf
    • https://cdn.shopify.com/s/files/1/0440/6309/6984/files/surubibexubemubejegumige.pdf
    • https://cdn.shopify.com/s/files/1/0437/0032/2458/files/65115102611.pdf
    • https://cdn.shopify.com/s/files/1/0429/6838/3641/files/75758847410.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/astrology_books_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99914628395.pdf
    • https://cdn.shopify.com/s/files/1/0458/6022/5177/files/97892061498.pdf
    • https://cdn.shopify.com/s/files/1/0433/9875/8567/files/46895441707.pdf
    • https://cdn.shopify.com/s/files/1/0434/5036/8152/files/kotir.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/sony_bravia_43_inch_4k_android_tv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5738/1530/files/92328833405.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wugituvunajobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/xejejivigigabusebosenu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6999/7207/files/8277677672.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_off00015be3.bin
4f1e4703e07f77d209ac02daf8c6e61a94697ce0714ce1c7e669c4c0f5f24461
pdf-font-stream PDF embedded font (sfnt) at offset 0x15BE3 5492 bytes
font_01_sfnt_off00016e6a.bin
7855754970e583ccc93f1e0eaf4cab019ac77604f763841b0f387bc79b879375
pdf-font-stream PDF embedded font (sfnt) at offset 0x16E6A 10704 bytes