Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c858f288503894…

MALICIOUS

PDF

45.2 KB Created: 2020-10-28 01:35:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9c51b977e6611f14387db0038a06e93 SHA-1: d58d6f09053a312946e94790931dcced79270c61 SHA-256: 39c858f28850389423ec2ee751b86a42b490218e6545905123ac50378a5439ef
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a redirector URL, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains text suggesting a lure related to Windows 10 permissions, likely intended to trick the user into clicking the malicious link. The ML classifier strongly indicates maliciousness.

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 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/strik?keyword=you+require+permission+from+trustedinstaller+windows+10
    • https://cdn-cms.f-static.net/uploads/4402944/normal_5f94a8a25a897.pdf
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f8ca8e69960b.pdf
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f933aac6adb6.pdf
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5f8fdf9222562.pdf
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f892b6179b9a.pdf
    • https://cdn-cms.f-static.net/uploads/4380070/normal_5f8e7f075a33a.pdf
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5f886d383d82e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0495/6310/7480/files/eternium_latest_mod_apk_download.pdf
    • https://cdn.shopify.com/s/files/1/0486/4324/4200/files/80126475513.pdf
    • https://cdn.shopify.com/s/files/1/0432/4353/6541/files/15190358190.pdf
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/zidizuvavaruwi.pdf
    • https://uploads.strikinglycdn.com/files/d6584035-10b6-4f50-aa73-f09ac38ed6e6/18246690388.pdf
    • https://uploads.strikinglycdn.com/files/f0cfe30f-90aa-42dc-9f5b-20f5ff404fdf/jai_demand__la_lune_paroles.pdf
    • https://uploads.strikinglycdn.com/files/45bc9563-d51e-4b61-ad50-7e5be7b472fb/borderlands_evil_smasher.pdf
    • https://uploads.strikinglycdn.com/files/d940d276-561b-4a81-a027-fd558f422c4b/26630385051.pdf
    • https://uploads.strikinglycdn.com/files/e1069e5b-34d6-4fdf-bdd7-3952e765bb7c/60454163683.pdf
    • https://s3.amazonaws.com/foneniz/rugagokiw.pdf
    • https://s3.amazonaws.com/zuguvoxoki/absorcion_y_transporte_de_nutrientes_en_las_plantas.pdf
    • https://s3.amazonaws.com/tejuvonixag/digital_logic_gates_and_truth_tables.pdf
    • https://s3.amazonaws.com/vavapekadoliti/wibuv.pdf
    • https://s3.amazonaws.com/jumedemimo/dental_office_manager_job_description.pdf
    • https://s3.amazonaws.com/jebupofedijakuk/zorivetimu.pdf
    • https://s3.amazonaws.com/wonoti/energia_eolica_brasil.pdf
    • https://s3.amazonaws.com/gupuso/rijaxujodejamuligedolo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007066.bin
bc4af155b789212cd09efcafbdd498511b8f667ccd08d34b4304549077a31510		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7066 5560 bytes
font_01_sfnt_off0000834a.bin
5980808349f9210ad69e91381c3eb69cb06a6ed2f856e2705c4d58c62acb1652		 pdf-font-stream PDF embedded font (sfnt) at offset 0x834A 10576 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.