Malicious PDF — malware analysis report

Static analysis result for SHA-256 b72d943bba3c08ae…

MALICIOUS

PDF

41.7 KB Created: 2020-08-03 01:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de39fa626f15aa426b5a0b2556707f79 SHA-1: e9d3ab34bcf1d486866dc966da563817b89bb32c SHA-256: b72d943bba3c08aeec46c7c9ac15c0e6f5348b0f27887d63b39e0a996a9d2d34
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. The primary intent appears to be directing users to malicious infrastructure, likely for phishing or malware delivery.

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/pify?keyword=edgemax+default+password
    • http://files.airdriekarate.net/uploads/1/3/1/4/131410736/wewamon-poderuxajadewaz-velixepopogobi.pdf
    • http://files.pjschweizer.com/uploads/1/3/0/9/130969539/gafita.pdf
    • http://files.mantorvillain.com/uploads/1/3/1/4/131438641/6945876.pdf
    • http://files.purpleheartoutdoors.org/uploads/1/3/0/7/130776343/rapim.pdf
    • http://files.movement-arts.net/uploads/1/3/2/6/132680932/xefurixafakaxik-duxududag.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/sovumugewogusaxogutixot.pdf
    • https://cdn.shopify.com/s/files/1/0435/2661/9288/files/diablo_2_rune_words.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7308/files/38476652362.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/65357595529.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/rowakuzogudabesegafeduj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3934/2247/files/54403251590.pdf
    • https://cdn.shopify.com/s/files/1/0443/1734/3900/files/windows_7_virtual_machine.pdf
    • https://cdn.shopify.com/s/files/1/0433/6133/7494/files/sevutaxewikidupenikudakof.pdf
    • https://cdn.shopify.com/s/files/1/0431/5024/6054/files/38105526692.pdf
    • https://cdn.shopify.com/s/files/1/0435/6567/8755/files/seposuxuba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/7918/8118/files/53407528815.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063d1.bin
c33447c22c6e9f9e1c00d7bd1c3a4bddf10dd123f90adf6dbb569c7724c853a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 5476 bytes
font_01_sfnt_off0000767d.bin
edccafcc292b1ba0f8aff5be44c0d3a9a7ff989de5b5ec3950ae31fd9abf0a27
pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 10296 bytes