Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee9c9563bcaaccd…

MALICIOUS

PDF

40.6 KB Created: 2020-08-15 03:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf6e661a3a6f7502edb3caa720469a8b SHA-1: 8ddfdb42cd09f5967c67e85088e8f2a88f7b8fc6 SHA-256: 5ee9c9563bcaaccd17f0b121354e8f4918cc3544d0d607a63518ed820b4633c9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is ttraff.ru, which is flagged as a redirector. The document body, though heavily obfuscated, contains references to the malicious URL and other PDF files, suggesting a lure to a malicious site.

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=pose+reference+pack
    • http://files.wyandotseniors.com/uploads/1/3/1/4/131437242/2337674.pdf
    • http://zuguxujek.wishchildrensboutique.com/uploads/1/3/1/4/131452976/938b3e3ec08.pdf
    • http://files.winmillppm.com/uploads/1/3/0/7/130740123/ebd535caa81.pdf
    • http://wajuvuzoj.happaglowco.com/uploads/1/3/2/6/132682646/rizimefirituk-worekax-womilafimi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/2943/8370/files/56556824738.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/nazonegegenaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/28868430451.pdf
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/diario_oficial_de_alagoas.pdf
    • https://cdn.shopify.com/s/files/1/0459/9601/5773/files/dj_remix_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0432/4638/7362/files/37450909632.pdf
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/43022726701.pdf
    • https://cdn.shopify.com/s/files/1/0438/6874/9979/files/wivipopibepomotik.pdf
    • https://cdn.shopify.com/s/files/1/0440/6027/8936/files/vinulagifupupokagudunore.pdf
    • https://cdn.shopify.com/s/files/1/0450/3266/9334/files/micro_turbine_generator.pdf
    • https://cdn.shopify.com/s/files/1/0429/4112/0679/files/american_gods_episode_3_torrent.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_off00006216.bin
3d9e682209d29cc255731d6757c5df2bfc0b0d29cb97d31e6b902245058e4a1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6216 5040 bytes
font_01_sfnt_off0000734d.bin
175df5443cb775db9210bf93742fdff88de3726bd681d2a742b75cf9289b3def
pdf-font-stream PDF embedded font (sfnt) at offset 0x734D 10052 bytes