Malicious PDF — malware analysis report

Static analysis result for SHA-256 d644f60746d82ee3…

MALICIOUS

PDF

41.9 KB Created: 2020-11-07 02:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ba4842e722b659757200c89e0d195ba8 SHA-1: 91cef203e8b8000f20d5da446e1669d363ae05a6 SHA-256: d644f60746d82ee35486e70bbff50e6a87fa2eb59fcd024769c7f4a76f2b2041
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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/aws?keyword=st+clair+county+jail+belleville+il+number In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450048/normal_5fa340cb5f049.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fizafadolozu.files.wordpress.com/2020/11/31713389540.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/brokerage_agreement.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/mobile_strike_hacks.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/46706322409.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/44874307558.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/75868669127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c02042-ddcc-47b3-8e6f-d5f94b91cdac/vozigiz.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/gps_antenna_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25712b58-e215-4f96-a1a1-98c25204e7fc/59425021110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be4610b8-314d-4610-b0d6-6ce4f2bf15be/20343117501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8726e41d-7039-4972-83ef-f52b463e2a4f/born_confused.pdfIn PDF document text
    • https://rejeben.files.wordpress.com/2020/11/nojekavoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/reciprocal_membership_museums.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_off0000631a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631A 5248 bytes
SHA-256: 94ade7a22a2398be328e4d14cfcae55cac58e49af426d77d8b57a94fdcaf4833
font_01_sfnt_off000074f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F7 11040 bytes
SHA-256: 3e3431adaa6ec47b5587c4d05317b9a1f545d993297a659c0065e486a4f7843a

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