Malicious PDF — malware analysis report

Static analysis result for SHA-256 316d0b84d7b81075…

MALICIOUS

PDF

49.9 KB Created: 2020-11-01 18:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 64e3403ab4420bbf674580bde3bb6419 SHA-1: 176d70289e9870d339d74471a0fd84b9d9d901e2 SHA-256: 316d0b84d7b81075ec8d68d2709664cc60dcb7414d85a22e3799f61e55d00616
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Arcade basketball unblocked' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of many external PDF links further supports the classification as a link farm, likely used for SEO manipulation or traffic redirection.

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://ttraff.me/123?keyword=arcade+basketball+unblocked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_5f989b7bd7c47.pdfIn PDF document text
    • https://valakafugajebe.weebly.com/uploads/1/3/4/3/134330742/vamapini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_5f9996b1e2198.pdfIn PDF document text
    • https://zepixufiguw.weebly.com/uploads/1/3/4/1/134108583/bigipizedewoluzamesi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415546/normal_5f98ceb812197.pdfIn PDF document text
    • https://fiwisiroveton.weebly.com/uploads/1/3/4/3/134339953/77f12058ebd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393502/normal_5f8fd363d4158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404955/normal_5f9a4badf1864.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/betimugi/tides_review_and_reinforce_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/dscraft_texture_packs_download.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/current_trends_in_nursing_education.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/83106871427.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AC 7168 bytes
SHA-256: 6627e95d54ba964986ed25f1dccb80d8916012f44771424f5bb32512ffc46c35
font_01_sfnt_off00007cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD2 5128 bytes
SHA-256: 79dc0b04111cdc7cf69e5c211c575dab670caf08710a3d708b481323c125acb7
font_02_sfnt_off00008e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E47 1688 bytes
SHA-256: 7589cb9f0e709ca6bdd8af1c38d1552a363c3d0cc30cec28ccea6d03d7941ff1
font_03_sfnt_off000096b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96B7 10328 bytes
SHA-256: 9c97ac7373e18cb344bc11f63811ba0256ed0fe6754b25aabaf607de9196c113

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