Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d7f430511e7d6e…

MALICIOUS

PDF

41.7 KB Created: 2020-07-28 05:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8cc48ba8eb8e0974fa8b2f95d1c5a9e SHA-1: 2cad7d481907ac86fe599b01aba9343199502c54 SHA-256: 53d7f430511e7d6ef8074211fa1fdacd1215b7641884cdbe53ad9ff247b9583d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to movie downloads. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to host further malicious content. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious verdict.

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.cc/pify?keyword=anaconda+1+full+movie+tamil+hd
    • http://files.nmecfg.org/uploads/1/3/0/9/130969166/nejolipeta.pdf
    • http://files.evergreenhomeconcierge.com/uploads/1/3/0/8/130814513/lireruwipe.pdf
    • http://files.tonyarepslove.com/uploads/1/3/1/8/131856456/1551648.pdf
    • http://files.celebratecorvallis.com/uploads/1/3/0/7/130738576/xotumejuwuposapuzu.pdf
    • http://files.celebratec
    • https://cdn.shopify.com/s/files/1/0430/9562/1781/files/buxixeluxokoxi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65107231385.pdf
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/nawidaxixasofu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0881/8333/files/87931422837.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5303/files/zarumub.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/mexozori.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/85151304115.pdf
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/34108451275.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71062637782.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/pisimopoketuwolin.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/30183679316.pdf
    • https://cdn.shopify.com/s/files/1/0435/3989/0327/files/58134813827.pdf
    • https://cdn.shopify.com/s/files/1/0439/1819/6891/files/83985556905.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000660f.bin
dea2b78378954352a4f66a5d9dc4a2a9f26115ba27a021a7eda428c78b5fbcd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x660F 4972 bytes
font_01_sfnt_off000076d1.bin
19418d8da5cf498a42a312e0e992bad6bcb324698bbdc1697653a767d3a92f76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D1 10184 bytes

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