Malicious PDF — malware analysis report

Static analysis result for SHA-256 068105aebf57a98c…

MALICIOUS

PDF

41.5 KB Created: 2020-10-06 15:11:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 82b58ac8ea4f2d10f4a9b15195b233fe SHA-1: 2acc99d954687ba325762baff3568e72b917db3f SHA-256: 068105aebf57a98c3f5a9c36235750420a82583c7757b041a3948ac23bfe325b
154 Risk Score

Malware Insights

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

The PDF contains embedded links to a redirector and a large number of other PDFs hosted on mozfiles.com, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the heuristic firings suggest the primary goal is to redirect the user to malicious infrastructure, potentially for further exploitation or phishing.

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.cc/pify?keyword=flip+master+hack+download In PDF document text
    • https://site-1039346.mozfiles.com/files/1039346/kemadovowedelel.pdfIn PDF document text
    • https://site-1038455.mozfiles.com/files/1038455/49176527691.pdfIn PDF document text
    • https://site-1037914.mozfiles.com/files/1037914/zunoxozorezugudovu.pdfIn PDF document text
    • https://site-1037233.mozfiles.com/files/1037233/sidegatitubotikukafumo.pdfIn PDF document text
    • https://site-1040426.mozfiles.com/files/1040426/66361274025.pdfIn PDF document text
    • https://site-1040124.mozfiles.com/files/1040124/84206957111.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7572/1633/files/5150156085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3149/3784/files/m36_tank_destroyer_1_35.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8254/9922/files/speed_and_velocity_worksheet_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2907/5880/files/gym_leader_pokemon_levels.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9530/4608/files/62878614748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44394aa8-ad3e-41ef-b1cb-15f5ca8b4346/begivuver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0715bce-2eb8-42b6-94db-4749cb8bfd59/886292407.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_off00006365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6365 5424 bytes
SHA-256: 2e748cede3da87f076a99bf7cbdd3a7858fd52f0e2f4997ac2a76ba3c08234fe
font_01_sfnt_off000075ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75BA 10456 bytes
SHA-256: 8ebe901daf9787c783801881347924ff4e8c9f536cfbffa34fe7395a60f0b592

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