Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef35fc5b20ac805a…

MALICIOUS

PDF

42.3 KB Created: 2020-11-05 06:00:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d59e222880f385b25eb6f218b350c333 SHA-1: 93963eabe0ad454279601b1c65978fb0d69423d4 SHA-256: ef35fc5b20ac805aa7d7f79ecdf098b656a54a52e1f37215e9e50e97dc6715c3
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The embedded URL, https://ttraff.link/123?keyword=gis+mapping+willmar+mn, is the primary indicator of malicious intent, likely leading to a phishing or malware download site. No scripts were extracted, but the presence of the malicious link strongly suggests a social engineering attack.

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.link/123?keyword=gis+mapping+willmar+mn In PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/fuzobivesas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_5f8afb742a134.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/xududev-ledavodu-jatulivarolaxe-bixebenal.pdfIn PDF document text
    • https://nirilixurem.weebly.com/uploads/1/3/4/4/134474770/defir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f8a86cf40339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5f88fa0384a92.pdfIn PDF document text
    • https://mesobesin.weebly.com/uploads/1/3/4/5/134590010/2488280.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://s3.amazonaws.com/wuniku/catholic_liturgical_year.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4538d39d-4cbb-4d06-acac-6518fa7f97e4/79601152640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/046dd95b-abe1-41da-ab28-dc46b83dd5d7/53971780453.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/10892357283.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/gavabagovuvofafaniradurel.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_off00005ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC6 4740 bytes
SHA-256: d80f4322b373ec275c17be0bb01aa5b646ddcd348f6a59a8c3a16798ead5304d
font_01_sfnt_off00006ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC2 10424 bytes
SHA-256: b4b22eadd3fd72e9bc4acf2d45edd9001b39adfab69e7fe44c9ebee9df6c28f5
font_02_sfnt_off00008e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E97 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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