Malicious PDF — malware analysis report

Static analysis result for SHA-256 da30e4d1459722ab…

MALICIOUS

PDF

45.6 KB Created: 2020-10-11 09:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d105705c40e8f030b23ca5db25f6b5ff SHA-1: fdbfe645354dfc55ee0951463440c6811d46ff17 SHA-256: da30e4d1459722ab5d4118ead64188168e52cae029d46c26b74e33772f0ce2e3
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector. The heuristic PDF_SEO_LINK_FARM indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further 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/pify?keyword=wise+old+owl+sayings In PDF document text
    • http://files.newpathway.co.uk/uploads/1/3/1/8/131857049/8e26b.pdfIn PDF document text
    • http://dotit.langsidechurch.org/uploads/1/3/1/0/131070340/3738448.pdfIn PDF document text
    • http://files.wildoatstogo.com/uploads/1/3/1/3/131382134/weduzidapaxewawugog.pdfIn PDF document text
    • http://bedim.naroomaanglican.com/uploads/1/3/0/8/130873872/lewusoxopenoboreliwa.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/ff659921-6caa-49c6-a98e-355a87655486/14691241282.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b4c9ec5-ac40-44f1-a655-1e66c10988ef/galatetured.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9059bc2d-d7f3-4508-843a-442716357e4d/lawanamepisinegobov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1a6bfc1-4372-4f26-b4bd-647dc2458825/senipuvoxerakigegumebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83276370-2d75-4de8-aefb-3b7ffde061c4/xekepixatitaxizujagova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93c4d2fe-6a70-4472-b3b7-be6a597ee085/nibesujisawomomabogitadud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9701f928-8d00-40ba-8ddc-865e4ad51a6c/liwotunigezuvedokoxuvumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d53eb16-7165-4f28-90c5-3e80c71c64ea/vesefubodafifufuxuribu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/facd7ad5-7276-43a0-890a-b83682834e08/39662020798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c1d1338-0563-471f-988c-18604ff430c6/nixitupibekonixedojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8203/2308/files/7286038223.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/evenflo_tribute_lx_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0346/9206/files/doduxesexofaxepakojunit.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_off0000704d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x704D 5104 bytes
SHA-256: 32d3484c5b16d472929b0a69dc9c40b40a4dce8f0ebc257b2dcd0486399df2e3
font_01_sfnt_off000081dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DD 12584 bytes
SHA-256: 64bd3421024ca650ea13f7bbb9b326f708c14134b57b15fce82c848d4077475e

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