Malicious PDF — malware analysis report

Static analysis result for SHA-256 95efb9310d2b4bef…

MALICIOUS

PDF

30.5 KB Created: 2020-10-30 00:01:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 644dc0b50e1d3e4fdd87851bb44b3876 SHA-1: 9d466bd8945291dcc9504356cf5c1c2748f1a7f8 SHA-256: 95efb9310d2b4bef91a083a67d3426eeadfb829bded47dd4a6fd9d46ccf66590
94 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to the URL https://gettraff.ru/aws?keyword=queens+college+library+barcode. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious.

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://gettraff.ru/aws?keyword=queens+college+library+barcode In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f9a52c6e2a22.pdfIn PDF document text
    • https://guxolufesa.weebly.com/uploads/1/3/4/4/134468064/7c6455cb.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/2a8e6.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/ec5a3e4cb324a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8fb5e36ecf1.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/2bd1a001-6492-4a90-a26e-0270865edab9/payfort_integration_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70099e41-bc2d-43a2-a02b-4da45f1453cf/savage_worlds_shadowrun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec4faff9-f0dc-4b91-8751-9de91a45e6a8/salafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efaedb9e-c906-4562-a384-11b72297f07b/gapaxovofefotoretukagem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc4ff280-065d-4356-b5e5-86fc7d4bcc30/how_many_protons_does_lithium_have.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/html_editor_software_for_android.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_off00003e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E13 5408 bytes
SHA-256: 87f733782cfb87b945a6b2f3b00fc7f389d79e8481b31e2300b61a3e91aa1da6
font_01_sfnt_off00005083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5083 8620 bytes
SHA-256: b6dc48e2ecf89140e8efe31de65853f0a4bb5c9eff0f0e4f3703fc2664c84518