Malicious PDF — malware analysis report

Static analysis result for SHA-256 b138f95b4f01a025…

MALICIOUS

PDF

37.2 KB Created: 2020-10-30 22:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 48a9871f4dbc3d6cada054f3145f881a SHA-1: 8103bb1486786bcab573639933013007d4876b71 SHA-256: b138f95b4f01a02523ef01436976dd97d1f19b1bd93ce3674d45718ecd7c24e8
114 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains embedded URLs and is flagged by a machine learning classifier as malicious. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates it points to known malicious infrastructure, specifically 'https://gettraff.ru/strik?keyword=bus+480+schedule'. The presence of a callback phishing lure suggests the document is designed to trick the user into interacting with malicious links or content, likely for financial gain or credential theft.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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?keyword=bus+480+schedule In PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/aff9bfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381752/normal_5f90b5b8d0330.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/8736151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_5f89451484c21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5f9c1edd97d8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408991/normal_5f949b41ac0b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_5f9046e48e9d5.pdfIn PDF document text
    • https://gifedoku.weebly.com/uploads/1/3/4/2/134234788/4121097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388157/normal_5f926434cb7a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7914b7f7-e73a-4be4-8697-93bcc12564fc/99911977878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6255469a-d927-479a-a550-250aa14c457e/zoteko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84401694-6dee-4d68-9d3e-8b4fae0be1fa/82183361921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00689af9-0d68-4719-a6ca-eb2a5e1083fe/gakobazazutitetaluvumibom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0056/0805/files/like_and_dislike_exercises_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04353e64-03c5-4a29-a660-9345754668a6/segopenolubu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000521d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x521D 5196 bytes
SHA-256: b72dd171d3ff620660a6b603e5eb7c755b81409bbc88733d606d7ddf75246dd9
font_01_sfnt_off000063d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D0 10648 bytes
SHA-256: d8703da7d1e1ff54e2798ee3e4ea5df58e9452443546483122bb59c70635a801

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