Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf737220dfe2c4c…

MALICIOUS

PDF

41.2 KB Created: 2020-10-31 11:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: baeda9d545bcb1099dc7913b0e1d608c SHA-1: e0ac8db3d8f4036b8872b4599cd68e659cf8859e SHA-256: 1bf737220dfe2c4c661ae0c66b7e1ddee8efed61d442e62981afa14ded0d96e7
154 Risk Score

Malware Insights

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

This PDF file exhibits malicious behavior by containing a large number of external links, many of which point to PDF files hosted on various platforms. One of these links, https://gettraff.ru/123?keyword=star+wars+essential+atlas+pdf, is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious infrastructure. The presence of a link farm and a malicious redirector indicates a probable attempt to distribute malware or engage in phishing.

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://gettraff.ru/123?keyword=star+wars+essential+atlas+pdf In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kadupe_ripovu_jozovagazemewe.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/1/0436/7751/5941/files/fresh_prince_rap_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4564/2663/files/10845673044.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/9109/1352/files/tubibadilokogufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/983c172c-ac5d-46e6-a7f1-1e875cadf2c2/fanidexugalanefopovima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5099/9193/files/44039403442.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6740afb6-f86a-4cf8-8fe3-8e3442b785d9/fijunilebawenowiduf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6610/4226/files/2020_holden_barina_tk_manual_my09_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fcca5b7-76d6-4f64-b8ee-534afec3f069/37868116820.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4fbc019-3a4d-47de-a3a1-f5753fbe4956/i5_6600k_overclock.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_off00006156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6156 5232 bytes
SHA-256: e66791a04653d77d8f562d79bf0826ee3895fb1ff9b4607c6dac4596df6cae13
font_01_sfnt_off00007343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7343 10908 bytes
SHA-256: 37887418e1fe7fa231fe9b486ce7df2d28b0721bf9cdcafba47a0c6d72f41e8c

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