Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7ee517b9d274ef…

MALICIOUS

PDF

58.6 KB Created: 2020-11-20 08:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a85c844d6b51946c1c0a03a5787ed377 SHA-1: cc7c83c1774819908dd47623d935bb2ad9090330 SHA-256: ee7ee517b9d274ef48b5fa51d0d0039bcfdabfb9ed89b6aa8417dcc304f2ae24
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://gettraff.ru/123`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including `https://s3.amazonaws.com/luramamelolem/92776712335.pdf`. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a phishing or trojan attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gettraff.ru/123?utm_term=my+hope+is+built+on+nothing+less+youtube In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f87418e1dc55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417327/normal_5fb5803bc2343.pdfIn PDF document text
    • https://vasabofilusav.weebly.com/uploads/1/3/4/5/134585229/8463065060.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/92776712335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c129dfe1-192c-4cb9-af30-92d235c38c46/akdy_shower_panel_installation.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/wish_promo_codes_free_shipping_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed2bcd0b-d7dd-40f4-b24f-96f19cdd3a32/monster_coffee_drinks_caffeine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be711e4d-ff0d-40f9-9ce2-ba8f0489f7f3/sugetejifazedadakepedekis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d1f9daa-4987-48a8-adc6-c53b60e2d2f9/60813261129.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_off0000a998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA998 5020 bytes
SHA-256: b45492872b05570506cf82260e4a79854de895c559427ff518e1de76ca7e771f
font_01_sfnt_off0000bac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC2 10328 bytes
SHA-256: 7851bca007be75b8233bfcb42ce62475c187b2875705a3b4f3f53738f909a8e3

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