Malicious PDF — malware analysis report

Static analysis result for SHA-256 720cf4726a8f4d88…

MALICIOUS

PDF

47.1 KB Created: 2020-11-03 04:09:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51cd1e38c7cbcd5b8e1e581bbe311068 SHA-1: df362ee1caa2805f950427ec4085436b43788686 SHA-256: 720cf4726a8f4d885a4439198f9524e94d91a632c5ca83a055b4e80e3db449be
94 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 'ggtraff.ru'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, indicating an attempt to lure the user to a potentially harmful site. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a 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/123?keyword=thaumaturge+leveling+guide
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/5052659.pdf
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f901d399f792.pdf
    • https://cdn-cms.f-static.net/uploads/4380675/normal_5f9079a24ed12.pdf
    • https://xanuvomapimiv.weebly.com/uploads/1/3/4/3/134342034/25ad149.pdf
    • https://cdn-cms.f-static.net/uploads/4376857/normal_5f9d101337f34.pdf
    • https://cdn-cms.f-static.net/uploads/4415950/normal_5f9a3ee996117.pdf
    • https://daletutanedura.weebly.com/uploads/1/3/1/6/131636587/2696566.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0496/7714/0124/files/view_others_snapchat_friends.pdf
    • https://cdn.shopify.com/s/files/1/0507/2948/4443/files/clear_choice_rescue_cleanse_walgreens.pdf
    • https://cdn.shopify.com/s/files/1/0496/3011/8052/files/duwif.pdf
    • https://uploads.strikinglycdn.com/files/d3a2a014-f14e-4a79-b0f0-499615305799/96134482031.pdf
    • https://uploads.strikinglycdn.com/files/5a2dcffb-904e-48f7-b9af-8ed4c45269a1/rca_dvd_home_theater_system_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/dobikawafon.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_off00006dd3.bin
6be1738d97eb7458501b5060d940b3d459ef1a43cc8e0f1336db7ac160019abd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD3 4844 bytes
font_01_sfnt_off00007e1a.bin
8119bff32cef26b15b37a031ad44742be7a45737a2770ea22bb7fe2cbf302dc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1A 10420 bytes
font_02_sfnt_off0000a199.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA199 4324 bytes