Malicious PDF — malware analysis report

Static analysis result for SHA-256 f634fe9265405f27…

MALICIOUS

PDF

41.1 KB Created: 2020-10-30 21:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b7de814cfd9bbc951f24e7011516cb8b SHA-1: 331254ca2d2ba6fad9036f4da276ce9287a53028 SHA-256: f634fe9265405f2775d9d85d0ce4443f87cdf441f3b2b1d67c8d458788f781ff
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes the URL 'https://ttraff.cc/123?keyword=scapular+upward+rotation+movement', suggesting a lure to external malicious content. The presence of multiple links and the ML classifier's high confidence indicate a malicious intent to redirect users to harmful sites.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=scapular+upward+rotation+movement In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f8719b463b77.pdfIn PDF document text
    • https://xizirogubo.weebly.com/uploads/1/3/0/7/130776043/97e16.pdfIn PDF document text
    • https://mupawume.weebly.com/uploads/1/3/4/3/134365579/3244505.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/semipitipobusaleja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367312/normal_5f9bafe10c39a.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/4306422.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/kupifadamuzu_fijojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f8b3b3093373.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/rebodi.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/db315d6c-3a99-4f05-8438-955c58c6b6b2/pdfgrabber_7.0_license_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a624ca2e-ead9-4547-a087-7015337233c4/molajizipujorod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87678aec-9da1-4407-9f29-ccf064ce7c00/feridowirudiwelofasam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76299dbf-73f4-4da5-8af3-68a670cfe880/28512045468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79db64f8-2032-40cf-9e2d-39c050743b32/62101128834.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_off00006227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6227 5296 bytes
SHA-256: 698f68c89ebbc3213ea9c4e414c25f34a44709ae19e89a31d634ffc2ff96306f
font_01_sfnt_off0000742b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x742B 10432 bytes
SHA-256: c2192f528368c4d4f0afe7166f416052c3f287b5ba2aed15bfbdad7c7b28f2ce

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