Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1da7cd6b66f1a57…

MALICIOUS

PDF

44.2 KB Created: 2020-10-30 14:13:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 156bb1099d6852d8b25757599009d16e SHA-1: 9614eb9ae0971c93d3674d5f3c7cf225adeae1b9 SHA-256: f1da7cd6b66f1a5771672e628f2418107aa6aa6732e53e284ab2506021aaf5f9
134 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically 'https://ggtraff.ru/123?keyword=mayer+auditorium+usc'. This indicates an attempt to lure users to a potentially harmful website, consistent with phishing or malware delivery. The ML classifier also strongly flagged this PDF as malicious.

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.
  • 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://ggtraff.ru/123?keyword=mayer+auditorium+usc In PDF document text
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/moronakaxame-lewige-kiwumafaka-poxakajibi.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/e0eeb842ca1bb.pdfIn PDF document text
    • https://poxaneduwi.weebly.com/uploads/1/3/4/2/134234601/debfd2c1.pdfIn PDF document text
    • https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/72669b82e65aef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374978/normal_5f90ff2375e0e.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/7d240778-7dd5-4bf9-8734-33ac99c37438/73296907910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a4500f-714a-4273-b2b0-c65b0e810a5e/70640561464.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/bhagavad_gita_hindi_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e0d22cf-d473-40b0-911d-6147fa1462ba/52216310995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e5422af-85f9-4513-bb19-ca8b5d1261ad/tatugixabanasirotexa.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_off00006eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAE 5160 bytes
SHA-256: 434296deb0e5deff33abe19f0be2f172c33ac97abbed096a65301983a3c04c26
font_01_sfnt_off00008037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8037 10632 bytes
SHA-256: 5a8727d6823c8ccc4eff3cbe024037a2e4f48cc483f2aaced6fb2c04c256310f