Malicious PDF — malware analysis report

Static analysis result for SHA-256 e35a73289f01629e…

MALICIOUS

PDF

33.4 KB Created: 2020-10-16 22:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4db1ae3f9c94ae10a6e4ecc6c18f275a SHA-1: e898771ea3cb8dec7b884c9cb71a7ecc2f979762 SHA-256: e35a73289f01629eb221c15c37451943e74d0eb36d2866b140a0258c56298e41
94 Risk Score

Malware Insights

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

The PDF contains a link to known malicious redirector infrastructure, which is likely intended to lead the user to download a secondary payload. The ML classifier also strongly indicated maliciousness. The document body text, though partially obfuscated, contains the primary malicious URL and other URLs that may host further stages.

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.me/123?keyword=unsealed+roads+manual+download In PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/501417.pdfIn PDF document text
    • https://pasuliwipo.weebly.com/uploads/1/3/1/4/131452824/dezubexomusexi.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/katumudizitijegenop.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/b88051665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367665/normal_5f87e2a3d6937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f872dfc1b90b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f899b7c63295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f873b57e06e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5f893ec6111fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f870305a79a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f8925725c760.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/131300a2-a391-4604-b59a-185425d916c9/37345381889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5abc45c8-ee5b-4ec1-a6b9-b3f371d8d066/nomoxavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a46816-463d-4539-adda-bba385744e52/laditazawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7827/8563/files/let_the_right_one_in_epub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5833/8715/files/los_olvidados_buuel_descargar.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_off00004817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4817 5052 bytes
SHA-256: 62422e9c19323209602e079b7af657527b90e46ed4402c5b36741797ae516195
font_01_sfnt_off00005937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5937 9344 bytes
SHA-256: c67d0685c96acca28d50b9a7cbc0ce66bae2daac993bc69fae345bc72df5a099

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