Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5b62af6cf043a3…

MALICIOUS

PDF

37.5 KB Created: 2020-11-01 07:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e6e8e661c9c5a4f5f5fd4df1a1e7be70 SHA-1: 4b4dc0de45b593136ddd7336e521be9edfad515c SHA-256: bc5b62af6cf043a306e425402e066a79fc35dc686fbb1174d8f01a908e9c615d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF file was flagged by multiple critical heuristics, including PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM, indicating it is designed to redirect users to malicious infrastructure or participate in link farming. The presence of a malicious redirector URL and a large number of embedded links to other PDFs supports this assessment. The ML classifier also strongly indicated maliciousness.

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.
  • 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.
  • 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://cctraff.ru/123?keyword=alexandria+senior+high+football In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_5f9828bc08db2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413714/normal_5f96592c3052d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f87fe15a48a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f9ae9f81bd8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5f8e5f0011f7b.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/5910241.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/mipizuzazarof_zadonuburi.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/c3e01cf6-fb25-41ad-a2e3-2b4de998e0a9/jutok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4622/7096/files/words_that_start_with_s_to_describe_someone_positively.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f03aa607-1fc5-416b-9649-7a5b33191fb3/1086349257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b45cb2ab-36cb-4c24-ab45-5e41f9a9e242/domavojalilutilako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4416/6049/files/navigation_bar_android_transparent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08bec214-26ef-4090-94f7-01966ec39c89/sexewubedanuvam.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_off000052ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52AB 5368 bytes
SHA-256: f0d42c912ca688bcf1f8a407b8736d218f95c4adf75c84e1e05b3dc791799f67
font_01_sfnt_off000064e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E7 11036 bytes
SHA-256: f7d08850a5845dab4b8c809e39ae2411ec708c66a12420762dd205bcf7d02991

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