Malicious PDF — malware analysis report

Static analysis result for SHA-256 564ce4d7f80729d6…

MALICIOUS

PDF

36.7 KB Created: 2020-11-03 08:56:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b3b6ee6267ed2fba9e8b76ce44723094 SHA-1: 2aac728023ef0d20221a33ac7b9f9b63baa431b9 SHA-256: 564ce4d7f80729d6b77f44862d6cf3cbdef0346c8f5f645aaf674da1f8d2e96c
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 infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL, https://ttraff.com/123?keyword=westerly+creek+elementary+school+denver, is likely used to redirect the user to a malicious site. The ML classifier also flagged this PDF with high confidence. No scripts were extracted from this sample.

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://ttraff.com/123?keyword=westerly+creek+elementary+school+denver In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367643/normal_5f8c632c51462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f90d1b9060d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387702/normal_5f970298d8411.pdfIn PDF document text
    • https://mimasalidapu.weebly.com/uploads/1/3/4/4/134466186/5172429.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410211/normal_5fa06eef9d9bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_5f873d3644993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382004/normal_5f9f9343d0836.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/42d89847-29a0-4f7d-9f2a-e0feb38624a0/the_irishman_parental_guidance.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/72016197987.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd998e29-2c27-45f6-ad74-bc71bb2623ef/jekufuzatota.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/17th_amendment_of_bangladesh_constitution.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_off000051f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51F9 5416 bytes
SHA-256: 6313e82849f3ab7258c572231674caa87283cb2d24df726f1cdc83af987cd8c3
font_01_sfnt_off00006450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6450 9944 bytes
SHA-256: a8add3f9dd03f368d1f59e7d821bf352de18f3fe48e95313036dc5d5527f7a72