Malicious PDF — malware analysis report

Static analysis result for SHA-256 163c0bdc47c872d1…

MALICIOUS

PDF

48.2 KB Created: 2020-10-28 09:02:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd8ad624be0b43d70a1d013325702b4e SHA-1: 7a5f5fe8e218f0def5769e214d85f955b96895c2 SHA-256: 163c0bdc47c872d1f94d1a1aebbfa680804de3d8898d6e661bbbff2df0240a8d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to various PDF files hosted on Weebly and other platforms, indicative of a link farm. One of the primary links redirects to a known malicious domain, suggesting an attempt to lure users to malicious content or phishing sites. The document body, though partially garbled, contains the same redirect URL and other PDF links, reinforcing the link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://cctraff.ru/strik?keyword=gopro+4+blue+light+flashing+when+off
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/nivinunof_gidip_lodulikitu.pdf
    • https://lisoletabe.weebly.com/uploads/1/3/4/5/134511207/3381957.pdf
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/pojofitozebul.pdf
    • https://notapogixunimo.weebly.com/uploads/1/3/4/3/134363186/1266742.pdf
    • https://fusajebotiv.weebly.com/uploads/1/3/4/3/134320253/jogidani-gofobu.pdf
    • https://kulojimafad.weebly.com/uploads/1/3/4/5/134518235/bujuzirudijujo.pdf
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/volaxokavaramu_tesukezubugo_nojofam.pdf
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/palaj_xofepevez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a101a6ca-473a-474e-a252-e53d14f61a65/94875565323.pdf
    • https://uploads.strikinglycdn.com/files/19183be9-a85b-4599-861d-c140fd87a339/36318032696.pdf
    • https://uploads.strikinglycdn.com/files/110dd1d9-ae4f-48d2-a9ef-1221fd4cb949/9667382790.pdf
    • https://uploads.strikinglycdn.com/files/1407ddfc-adce-4ea7-afe3-535d7b98df05/chemistry_8th_edition_zumdahl.pdf
    • https://uploads.strikinglycdn.com/files/ab7fef87-0330-4437-a159-b02c8cabb2c8/jowamavukudopigefugu.pdf
    • https://uploads.strikinglycdn.com/files/512a9862-b634-4950-9f14-1cd6603b23e4/18624083241.pdf
    • https://uploads.strikinglycdn.com/files/35382498-18c5-4379-ab34-f201b1f9cbc4/ropikolapiwajil.pdf
    • https://uploads.strikinglycdn.com/files/f46509bf-ca68-4d14-b18a-fef93b627ed9/34384579394.pdf
    • https://uploads.strikinglycdn.com/files/34aad356-f888-4fda-aa65-fbdd9bd428bb/bepikawoj.pdf
    • https://s3.amazonaws.com/pusolefosex/simone_de_beauvoir_livros_em.pdf
    • https://s3.amazonaws.com/fomaralunex/49037312955.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/sesujidubuzuwadep.pdf
    • https://cdn.shopify.com/s/files/1/0438/2959/2214/files/nabufumasunejebajenur.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000860d.bin
2f0299dcd44a3258748c65b1201b7c1422a7961ca652cf6d14e6dc85ace89b06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x860D 5512 bytes
font_01_sfnt_off000098e8.bin
6346018e902729e7b80f1f75f079c4bee06e8ddfbcfdbcd1a69df420bca5f5ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98E8 10604 bytes

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