Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5bd2d6ac0bd297…

MALICIOUS

PDF

41.1 KB Created: 2020-11-02 22:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3dd9f317d1bb76fa1cd5bd0959dfb65e SHA-1: 198ce6ec9b5dbe5f3c58a787461ae196db1f2477 SHA-256: 0f5bd2d6ac0bd297543ae4c459dcea1e5f8a4cbc5987aa376b9ab06e1d807466
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and contains numerous embedded URLs. One URL, 'https://ggtraff.ru/aws?keyword=samsung+tv+un40j5200af+wall+mount', is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is central to the malicious activity. The presence of a large number of external PDF links indicates a potential link farm or SEO spam operation.

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://ggtraff.ru/aws?keyword=samsung+tv+un40j5200af+wall+mount In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5f88908fc6a57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_5f995d93bde7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379489/normal_5f8c70de915c9.pdfIn PDF document text
    • https://jobugatiponez.weebly.com/uploads/1/3/4/2/134234820/9021202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_5f9d2fa32b930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5f8fa52b6dcb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5f911efcf3bcb.pdfIn PDF document text
    • https://kakawugob.weebly.com/uploads/1/3/0/9/130969990/kugoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366020/normal_5f9284b9d354c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417329/normal_5f97c16255e46.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/1/0502/8583/8532/files/league_of_legends_hyper_carry_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/deled_assignment_506_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/74925755257.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_off00005fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC2 5808 bytes
SHA-256: 19b7d014dbd892acf67f62f1bbfba3e9fc53f7729556ed05bf087202abbbdd6c
font_01_sfnt_off000073a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A7 10560 bytes
SHA-256: 456dfdec7054c2b40ac65c15faf78eb5af01ca566009469c67df98a3580693d6

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