Malicious PDF — malware analysis report

Static analysis result for SHA-256 e308b75a01fed3f6…

MALICIOUS

PDF

34.7 KB Created: 2020-10-29 23:34:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 234db34e8ceedde0ac71f48890406e76 SHA-1: 3a3069e8e8c693814a9a894051ef69eeaab9d02a SHA-256: e308b75a01fed3f6d40f0b818aa58568566a30f037a078aa7bacf263393eb892
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection scheme. One of the primary links, https://gettraff.ru/aws?keyword=psychology+1101+final+exam+study+guide, is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains similar URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://gettraff.ru/aws?keyword=psychology+1101+final+exam+study+guide
    • https://vekejuritikoj.weebly.com/uploads/1/3/1/8/131857631/sozasolenejur-zajitojorewusup.pdf
    • https://patufefuwo.weebly.com/uploads/1/3/4/3/134312622/1500d.pdf
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f8824e384099.pdf
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/vofokimuwunoxurafut.pdf
    • https://dejuxowiku.weebly.com/uploads/1/3/0/7/130738850/bilekazokipo.pdf
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f8768826427d.pdf
    • https://cdn-cms.f-static.net/uploads/4371010/normal_5f8c9d27de5ab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6c1b4ec8-0c9c-419d-80e9-ce0a02176336/49131906913.pdf
    • https://s3.amazonaws.com/wibadinavosunom/55866092790.pdf
    • https://uploads.strikinglycdn.com/files/a2de0393-a7af-4bc4-80b5-3ae284585f7c/14125472940.pdf
    • https://uploads.strikinglycdn.com/files/55338582-1678-499e-bc5e-d0b4079eb849/55170690968.pdf
    • https://uploads.strikinglycdn.com/files/54137b91-a5cd-42ed-ad4e-e54da183ff94/73257520877.pdf
    • https://uploads.strikinglycdn.com/files/cdef98ec-6b63-482d-b300-a60af12788ef/25501567095.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006797.bin
51c63042b0926280f4d506ccc85632f327bf436b6b1388343df73408008994de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6797 5704 bytes

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