Malicious PDF — malware analysis report

Static analysis result for SHA-256 707877dfd274dbf7…

MALICIOUS

PDF

43.3 KB Created: 2020-10-27 19:25:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bce4ce4442dd84046acde70a72e417ae SHA-1: 7e6315f774058a9b4eedb0a684d565262c6f40e8 SHA-256: 707877dfd274dbf793f5908769fdeac2365df23db0ddc69a10419bafa699eac6
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a browser extension installation lure, indicating a social engineering attempt. The embedded URL https://ggtraff.ru/123?keyword=unturned+server+hosting+commands is a known malicious redirector. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting the primary goal is to drive traffic to malicious sites.

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://ggtraff.ru/123?keyword=unturned+server+hosting+commands
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5f8733a9ccaca.pdf
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f8c756b5c708.pdf
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/de4157cf11b84.pdf
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/rezuja.pdf
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/44d87feaf8ee.pdf
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/e1a787ac6c.pdf
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8925184.pdf
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/8230566.pdf
    • https://cdn-cms.f-static.net/uploads/4419430/normal_5f9792e4e2e54.pdf
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f939d95c5338.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0936f06f-ceb8-486a-8071-31c6010537b3/denewerigirukaxolurimumod.pdf
    • https://uploads.strikinglycdn.com/files/cb789e0d-a732-4bd3-9b1a-0184984728e6/4424847065.pdf
    • https://uploads.strikinglycdn.com/files/2564d1da-67a8-48e6-9117-19b151a974cc/40211784928.pdf
    • https://uploads.strikinglycdn.com/files/48e88b0c-9141-4c13-a49e-2edaff4e89e4/kotunika.pdf
    • https://uploads.strikinglycdn.com/files/39407cfc-e524-4b43-aa74-83631a70255a/muvizenodovuvur.pdf
    • https://uploads.strikinglycdn.com/files/16f6f707-32c3-4ac5-a888-dfb4af6afae8/dolovasadotivoxukinisuja.pdf
    • https://uploads.strikinglycdn.com/files/d3be7cd8-6826-4573-8122-9294bf44cc42/87610740670.pdf
    • https://uploads.strikinglycdn.com/files/6a40fa42-8449-43a4-81e7-57afb9a81c59/55754519079.pdf
    • https://uploads.strikinglycdn.com/files/aa969948-e3f6-4cbb-8352-190428b6c661/56257664556.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_off000068ff.bin
937d3b57a30d1cdf55a8062a433728ecae433cfb4204478a09ce45af780578f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68FF 5372 bytes
font_01_sfnt_off00007b1a.bin
cf30950484e6846fd02036c373f2ef530eb78d7c3724c17dd0987882b7da561d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1A 10868 bytes

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