Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f005b267c28ffea…

MALICIOUS

PDF

53.2 KB Created: 2020-11-03 00:04:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9c7c552685a8e5ba17543d2670e432ab SHA-1: 192f48aec5ed55ddbe6c0cdd073bd2233664dcde SHA-256: 9f005b267c28ffeace0bc7ec5f6e124bc49dc78ddf830a653bc944caea694480
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure for free Fortnite accounts, impersonating Microsoft, and directs users to a malicious redirector. The presence of numerous links, including one to a known malicious redirector, indicates a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to exploit users via social engineering.

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/1839c51.pdf.
  • 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.ru/123?keyword=free+rare+fortnite+accounts+for+ps4 In PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/1839c51.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/the_ghost_bride_full_movie_tagalog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9977/4872/files/18839447088.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca36f227-6ea2-4a5f-85d8-8d8a0be07b94/the_monk_who_sold_his_ferrari_review_quora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4114/7038/files/70172863720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d37c760-949c-49c6-bc16-b73219e4defb/14020773874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f3a283-79c1-4fca-8d8d-3d65370f7585/amazon_fire_7_operating_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30cc77a2-d59a-4ec6-afbd-811b30a33996/31360346783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39aadfa6-8d24-460d-a176-1f64c934c1ca/wufilaren.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/79844123926.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_off00009091.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9091 5020 bytes
SHA-256: 3ecba3458b620d70d2f31ad3251467050f817f7920448039e6757cadac4f5f9c
font_01_sfnt_off0000a1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1BD 11484 bytes
SHA-256: 406ed9eb93062c6d654bdea4cdffe24edd0dd409d2105eec611ff167d6f8e63a

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