Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9e01da6aaef49b…

MALICIOUS

PDF

47.8 KB Created: 2020-10-25 06:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 58126f977b65d84d11163b3edd78a63d SHA-1: adcb129a0fa19ed0822a2a034a6a0a012ea7ecd8 SHA-256: 8e9e01da6aaef49bb95da71460d55c17955d49e4d9b572d38a3358a38a450cd4
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, which in turn leads to a large number of external PDF files. This suggests a tactic to manipulate search engine results or distribute malicious content. The ML classifier also strongly indicated maliciousness.

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.link/123?keyword=wernher+von+braun+das+marsprojekt+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f8cb4c13ed58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393499/normal_5f91d589da394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5f88495d792de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381291/normal_5f8b3066594ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_5f8bfd4d39e2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f88bfd1e5894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f88944a34ace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f892141132d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f873bdb240cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5f90ee480ca42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8c767a6d2ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393901/normal_5f8ec480200df.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/1/0436/3144/4128/files/tegikusepoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/gilbert_name_meaning_urban_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0364/8432/files/78785034704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9464/2340/files/93968346194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6474/1026/files/3733008635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9898/7414/files/52598374654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7957/4715/files/mathematical_nonparametric_statistics.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_off000079ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AC 5604 bytes
SHA-256: adcb435f0a275b8a39bdf7fa78651a2b4abe1beff4387d91be09aa018d8af133
font_01_sfnt_off00008c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9F 11444 bytes
SHA-256: 0b9f0bad87d838f1f1dffe5a9dd790b019d2b58fe40ad20de2be848602fabd25

Open this report in the interactive analyzer, or submit your own file for analysis.