Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d44bc66da8159c…

MALICIOUS

PDF

43.4 KB Created: 2020-11-04 18:51:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 70f7075b58dbbef3b2abce050224c125 SHA-1: 3e4c7928811e3d254b4172e53e187858c8c6b195 SHA-256: 97d44bc66da8159ce6f151ce96bdd428feed57b97b9f8ced3cb3d4c6f314cc17
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body, though heavily obfuscated, contains the URL and text that suggests a lure related to song lyrics. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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://cctraff.ru/strik?keyword=california+love+2pac+lyrics+clean+version In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_5f9a5b00aeb67.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/53c01166-563f-44b4-83b5-3700df5ef599/cambridge_igcse_mathematics_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0da84e15-97e9-40dc-9859-fb5aae474be4/70491688371.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/terraria_apk_2019_no_license.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d642e970-cda2-4791-b92d-2d233160aee1/48007677887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a23a886-02d8-4304-9d95-0d47bd12d148/busemokumuwovomekufe.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/sufivelamekenojosotinadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94d4920d-5a15-47f0-8763-525784f84b42/perataza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2aba25-8795-4267-8cb5-6630df0aea3f/remosu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21fe3a6-5aa7-4277-a578-f6cf3039b658/pugixuwusagudibuwafeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96bf21ad-5ed9-412d-9a69-297404f9b7ac/50370097384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f80f7a-24f9-4034-80b4-7f1be27bce02/pejudedufo.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/into_the_darkest_corner_mobi.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/middle_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c561cc4-f89b-493c-b66b-381517f7d7ea/problemas_de_divisibilidad_resueltos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e241be4b-0b4c-4f3a-8ad1-88f75489ccec/44391799635.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_off00006c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C31 5208 bytes
SHA-256: dbe88b7876419dd8bc0a8482a2a26feebe6cd2168db0b1df0b41deb659cfd06f
font_01_sfnt_off00007e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E09 10192 bytes
SHA-256: d1e9e4e47751ef3274027f98dbd75d981af9f14d9cb85abf65d41f650a742004

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