Malicious PDF — malware analysis report

Static analysis result for SHA-256 a87f843fb8ce917d…

MALICIOUS

PDF

42.0 KB Created: 2020-11-03 06:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99fcde277abe734b436b25094a1bd6a2 SHA-1: b9de7c8ad023defbcdf3a338ebd4fef4898f65e7 SHA-256: a87f843fb8ce917d0e0510a2550d0069b2645b8228f9cf1e8be401b86a6c8abf
94 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically `https://ggtraff.ru/aws?keyword=minecraft+mods+and+addons+for+pc`. The document body, though heavily obfuscated, contains text related to Minecraft mods, suggesting a lure to entice users to click the malicious link. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/aws?keyword=minecraft+mods+and+addons+for+pc
    • https://cdn-cms.f-static.net/uploads/4381287/normal_5fa09f813976a.pdf
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f9fb550eac0d.pdf
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5f8b7511a1512.pdf
    • https://cdn-cms.f-static.net/uploads/4382778/normal_5f903363d5a9c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/35410260-a271-4c99-8cc1-85acc2221db7/90968687504.pdf
    • https://cdn.shopify.com/s/files/1/0478/9390/5575/files/vip_222k_manual.pdf
    • https://uploads.strikinglycdn.com/files/75793390-ceb4-4ebe-831e-754f4cd6b493/wet_and_cold_skyrim_mod.pdf
    • https://uploads.strikinglycdn.com/files/8a65c568-f177-4f90-b5de-3aa3283dd2a5/juzafodu.pdf
    • https://cdn.shopify.com/s/files/1/0503/1270/8293/files/sevewunamobesotasobed.pdf
    • https://cdn.shopify.com/s/files/1/0484/5423/8369/files/kikadenuxu.pdf
    • https://cdn.shopify.com/s/files/1/0505/0961/1163/files/kitiru.pdf
    • https://cdn.shopify.com/s/files/1/0504/2316/9211/files/spectra_flange_sizes.pdf
    • https://cdn.shopify.com/s/files/1/0486/8381/0966/files/cystic_fibrosis_guidelines_2020.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005984.bin
e50934b047c529989f3b7b645eed2862e163903be7493158faad84faf6640e90
pdf-font-stream PDF embedded font (sfnt) at offset 0x5984 5064 bytes
font_01_sfnt_off00006a9a.bin
50b27587ca25ddab05d3350315d99a9b467bd72761dc8d63f4320a4cccf0a2ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9A 10152 bytes
font_02_sfnt_off00008d58.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D58 4324 bytes