Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd986ab606d97c2…

MALICIOUS

PDF

50.4 KB Created: 2020-11-01 17:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: afe52eb0feddecce4f36892c2878606a SHA-1: 6dad9dd465213ef1528eee334edea87dcc3128bc SHA-256: 0dd986ab606d97c2068fff67465bbed5034e1f326c3834d461af736f1da4cf26
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gettraff.ru/aws?keyword=thank+you+maam+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5f9bfba0e12ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_5f8fd4c6d756d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f879fca18a95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5f974212b144e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368238/normal_5f93a68f48bb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377909/normal_5f9d031202ca9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_5f894eb2843cd.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/e09811dcb321b.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/jepawilo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418764/normal_5f9932b047660.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_5f8d1d523c7a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379477/normal_5f95ac50913eb.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/9dd4b72f-3e4c-4c94-941c-d7c04b3c3e15/can_you_download_netflix_app_on_computer.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_off000087b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87B6 5100 bytes
SHA-256: b005af772f597ce98392ee12bdc3c0406b2226423d1757694a381256ca642375
font_01_sfnt_off000098fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98FC 10136 bytes
SHA-256: a2d716e8b5c73bc61b76ed8277b65b0282717f81211471b863a85bbcbfa3b8ce