Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa003396104a79aa…

MALICIOUS

PDF

40.0 KB Created: 2020-11-09 15:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ebcb5202e596014b26c733a4f02a8f17 SHA-1: 742194601311624bda3b8cc0a9119f3b1c628b7f SHA-256: fa003396104a79aa68188f71327a87b451d699c06f9c3277024d3c7b0341bb6b
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is disguised as '7th grade chemistry lessons'. This heuristic, combined with the ML classifier's high confidence, indicates a malicious intent to lure users to a harmful site. The PDF structure itself is also noted as having duplicate object bodies, though this is flagged as informational.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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://traffmen.ru/aws?keyword=7th+grade+chemistry+lessons In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ramugimexixepaba.pdfIn PDF document text
    • https://ridulajevu.weebly.com/uploads/1/3/4/3/134352946/9b4556bf88dd51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411503/normal_5f9c9ab9c5e6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365638/normal_5f8945d4d4c5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f899dedbb2c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408481/normal_5f94438c4b529.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/2c62ca1daaa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9f3ab4cf-fbd7-4c11-b667-82f008cf4ccd/fipak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03da8c3e-303d-4f3d-a7ca-a383b248ce23/5199694449.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/watch_free_online_bridesmaids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3535ab6-c819-464c-987a-5b70a403c6f3/95535344919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be2fc2ee-f05c-49e2-b80c-99184831d055/fodonomerulewuvaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74240db3-e331-4eed-b79e-9a0b3abe6717/84634692047.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/robert_service_high_school_yearbook.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/baldurs_gate_enhanced_edition_apk_obb.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/66799772012.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000513d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x513D 5228 bytes
SHA-256: 7ccff141b2483576f62fdb259bb2b543c69b3e472eab8aecc46a311ff1adf430
font_01_sfnt_off000062e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E9 9888 bytes
SHA-256: 1cee87990f385d8eabc5cc94ee5cad4fb3dcd16d693a3b8eb9e1e461c8a53fd4
font_02_sfnt_off0000847f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x847F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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