Malicious PDF — malware analysis report

Static analysis result for SHA-256 9455ec441bf0ffe4…

MALICIOUS

PDF

44.6 KB Created: 2020-10-30 08:56:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c0804a0d84cbc6fe2c7286dbe84c73ed SHA-1: cf480b13ba66027c730c47b78ae556b3b52eb5f4 SHA-256: 9455ec441bf0ffe4d3ce06f27dca2413e0555523965f146966487261b4c1568c
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting, indicating a link farm or SEO manipulation tactic. One critical heuristic identified links to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

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.
  • 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.link/123?keyword=45+90+ammoseek In PDF document text
    • https://gononazenikemad.weebly.com/uploads/1/3/4/4/134482012/c990c1d.pdfIn PDF document text
    • https://gafekiwukuwemul.weebly.com/uploads/1/3/4/3/134313713/5793951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_5f88917768175.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/ratarel.pdfIn PDF document text
    • https://tisatazufewuvo.weebly.com/uploads/1/3/1/1/131163687/5452731.pdfIn PDF document text
    • https://zufugorutamivas.weebly.com/uploads/1/3/4/4/134401118/cefa2a95b2d0f8.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/46274da2b.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/6632099.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5f9073eb2b52f.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/wakenutikugeza.pdfIn PDF document text
    • https://dugegedop.weebly.com/uploads/1/3/4/3/134338267/5ea99cbf859.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0488/5390/9660/files/danby_ice_maker_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/75168942913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfbcef83-ccfa-43d0-bd15-14e65df1b113/46433095844.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/zinepuditivaposavozeg.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D2 4736 bytes
SHA-256: 4fabd8bb55cdb8820ca47d364fdfa25618e8b2cafe557a0492a53b2ef4734754
font_01_sfnt_off000072eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72EB 10680 bytes
SHA-256: 6f2a7d55c2fff0d0bbd2bd4b93468b1fcafc47e686ea5662d07d10465e6459b6
font_02_sfnt_off00009776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9776 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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