Malicious PDF — malware analysis report

Static analysis result for SHA-256 df19c08589533fc2…

MALICIOUS

PDF

72.5 KB Created: 2020-12-18 13:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7420119117136acee22d97675169274a SHA-1: 11fbb68808f02af4d2eaa16e4da660c86a6afb35 SHA-256: df19c08589533fc261fbbe7de86a9ce7474d3df6f48c177e0b69fbc63872b6db
154 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical alert for a PDF redirector link to `https://gettraff.ru/strik?utm_term=brazilian+jiu+jitsu+theory+and+technique+pdf`. The ML classifier also strongly flagged this PDF. While no scripts were explicitly extracted, the presence of a malicious redirector URL within the document body suggests an attempt to direct users to a harmful site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/strik?utm_term=brazilian+jiu+jitsu+theory+and+technique+pdf
    • https://cdn-cms.f-static.net/uploads/4477878/normal_5fbc44d56e25f.pdf
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f8803c6e3ef0.pdf
    • https://static.s123-cdn-static.com/uploads/4481156/normal_5fc7f727dee1b.pdf
    • https://cdn-cms.f-static.net/uploads/4452381/normal_5faee74168a11.pdf
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f975ee8955cf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/naxizugenabi/pumpkin_carving_scary_faces_templates.pdf
    • https://uploads.strikinglycdn.com/files/43e99447-1e85-4869-bd3a-cacdc9ef71ab/md-11_3d_model_download.pdf
    • https://static1.squarespace.com/static/5fbfff2111f6a4198480a438/t/5fc0f594e18c5c478e1e5f7f/1606481300686/74442997237.pdf
    • https://s3.amazonaws.com/wopari/jordan_christopher_jordy_chandler_now.pdf
    • https://uploads.strikinglycdn.com/files/e96ec899-3532-45b1-a55e-efc52c029596/new_fhx_server_apk_download.pdf
    • https://uploads.strikinglycdn.com/files/c0677938-7877-48cc-b467-74e21d1b222e/dosapimeziju.pdf
    • https://uploads.strikinglycdn.com/files/40de444d-c83e-43cb-b003-547412a02d94/dental_insurance_that_covers_veneers.pdf
    • https://uploads.strikinglycdn.com/files/991c9629-d6b5-4502-b66d-f4fac6c0c985/29772938738.pdf
    • https://uploads.strikinglycdn.com/files/64cfe199-37e4-4584-947e-dd84c6753721/41651811040.pdf
    • https://s3.amazonaws.com/gorajikunobixi/another_vs_other_exercises.pdf
    • https://s3.amazonaws.com/zatazewoz/exponential_smoothing_forecast_excel_template.pdf
    • https://s3.amazonaws.com/sosupejuxofedo/60453129104.pdf
    • https://static1.squarespace.com/static/5fc0e46f24b06a7eb3ff1788/t/5fcabceeb3233311c26cd092/1607122158265/lugul.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_off0000dbf5.bin
0919b1cd003f5a8f1b9727dc63ac23d5f47951ccc560b4e435a16e5feae63e98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF5 5644 bytes
font_01_sfnt_off0000ef35.bin
4bf6740815f30a41dd8e3caa3bcae3d0283390313fa7c3426981e4f810d0199d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF35 11508 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.