Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d45f0280fec16c0…

MALICIOUS

PDF

46.0 KB Created: 2020-10-25 10:00:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: eb1bede28d1a525fb367c59a69ed6f96 SHA-1: 3b4b69c15edff1cc391277a96a52146948551db0 SHA-256: 2d45f0280fec16c0ea809dcf91be9616a4cc9824e42772de0f9cb7c862c3b02e
204 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a lure for "edmodo apk free download", directing users to malicious or SEO-manipulated sites. The presence of a redirector link and a large number of PDF links suggests an attempt to drive traffic to potentially harmful content. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ttraff.com/123?keyword=edmodo+apk+free+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f87a07744957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409092/normal_5f92a944310e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365608/normal_5f87245fa28ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393503/normal_5f8ea7162a957.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403936/normal_5f93327439942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367950/normal_5f8f639fbc915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_5f8d8de8e7d78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416321/normal_5f9511e1e692c.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/luvatofa_litutibub_getege_leledo.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/ad85cfd85.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/vuxubofowa.pdfIn PDF document text
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/salibegajalexe.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/gafupuzepaxitevero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/84993228138.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/androderm_package_insert.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9f28ae8-20e4-43a4-85b8-f00870778583/thiruvasagam_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2bb1fde-fb39-4a38-907d-c072495379ce/18653377585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cca6b0e-862b-4342-ae79-ec292bc10ccd/sivibisugemitidase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f79793f-3f00-49c7-be9e-57ca0bbd7674/tu_rio_fluira_letra.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_off000072fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FA 5120 bytes
SHA-256: 9e4e33e8bea5354c8c4e3e30065a25ad2688a1cc866a02f6b6795863be9e5ab0
font_01_sfnt_off0000846b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x846B 11200 bytes
SHA-256: 54d5965d05aa7f5ccfdda9526f09450aa42925a6c315a3f5108ede2d3de816b9