Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58119b6784035eb…

MALICIOUS

PDF

26.0 KB Created: 2020-11-03 02:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af729646eff5dff8375523aeef22afd0 SHA-1: e55e6985b5970aba73f6e07110a9320fcaf0dee7 SHA-256: d58119b6784035eb1c4fd8293c67410bf13a510982a032ca1c93e773810a3cb3
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Weebly-hosted PDFs, indicating a link farm. One critical heuristic identified a link to known malicious redirector infrastructure at https://cctraff.ru/aws. The ML classifier also strongly flagged this PDF as malicious. The presence of these elements suggests the document is designed to direct users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 3

  • 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.
  • 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/aws?keyword=papa+s+freezeria+games+free
    • https://jasasenud.weebly.com/uploads/1/3/4/1/134131975/posadokipugu_xebavupesaro_povoge_pofapenugudited.pdf
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/7767590.pdf
    • https://cdn-cms.f-static.net/uploads/4417824/normal_5fa0a74a94f6d.pdf
    • https://jomunibudax.weebly.com/uploads/1/3/4/3/134342604/8316738.pdf
    • https://cdn-cms.f-static.net/uploads/4391611/normal_5f9c78d95eb5e.pdf
    • https://dajapofijakaf.weebly.com/uploads/1/3/4/2/134266914/kovizoxipem-gajireva-xarogupuwudiba-negegivit.pdf
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f961135746da.pdf
    • https://gazonuzurixe.weebly.com/uploads/1/3/4/4/134485976/fipalawisefub.pdf
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f9aec831abcc.pdf
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/8979937.pdf
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/3948262.pdf
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f9cc7b954d1a.pdf
    • https://cdn-cms.f-static.net/uploads/4379612/normal_5f8af7abbdd5c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0504/8477/3055/files/50173351372.pdf
    • https://cdn.shopify.com/s/files/1/0495/5950/3000/files/jesus_was_an_only_son.pdf
    • https://cdn.shopify.com/s/files/1/0437/2951/8741/files/angulo_de_treitz.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000482f.bin
3895f04b8ca10b5b3c617c7b15c60c915b65dbf78340067dc7e84a947c6362fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x482F 5240 bytes

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